6000 (six thousand) is the natural number following 5999 and preceding 6001.
Selected numbers in the range 6001–6999
6001 to 6099
6025 – Rhythm guitarist of the Dead Kennedys from June 1978 to March 1979. Full name is Carlos Cadona. 6028 – centered heptagonal number 6037 – super-prime, prime of the form 2p-1 6042 – 6042 Cheshirecat is a Mars-crossing asteroid. 6047 – safe prime 6053 – Sophie Germain prime 6069 – nonagonal number 6073 – balanced prime 6079 – The serial number Winston Smith is referred to as in the George Orwell novel Nineteen Eighty-Four 6084 = 782, sum of the cubes of the first twelve integers 6089 – highly cototient number 6095 – magic constant of n × n normal magic square and n-Queens Problem for n = 23.
6100 to 6199
6101 – Sophie Germain prime
6105 – triangular number
6113 – Sophie Germain prime, super-prime
6121 – prime of the form 2p-1
6131 – Sophie Germain prime, twin prime with 6133
6133 – 800th prime number, twin prime with 6131
6143 – Thabit number
6144 – 3-smooth number (211×3) 6173 – Sophie Germain prime 6174 – Kaprekar's constant 6181 – octahedral number
6200 to 6299
6200 – harmonic divisor number
6201 – square pyramidal number
6211 – cuban prime of the form x = y + 1
6216 – triangular number
6217 – super-prime, prime of the form 2p-1
6229 – super-prime
6232 – amicable number with 6368
– Most widely accepted figure for the number of verses in the Qur'an
6241 = 792, centered octagonal number
6250 – Leyland number
6263 – Sophie Germain prime, balanced prime
6269 – Sophie Germain prime
6280 – decagonal number
6300 to 6399
6311 – super-prime
6317 – balanced prime
6322 – centered heptagonal number
6323 – Sophie Germain prime, balanced prime, super-prime
6328 – triangular number
6329 – Sophie Germain prime
– Number of verses in the Qur'an according to the sect founded by Rashad Khalifa. 6348 – pentagonal pyramidal number 6361 – prime of the form 2p-1, twin prime 6364 – nonagonal number 6367 – balanced prime 6368 – amicable number with 6232 6373 – balanced prime, sum of three and seven consecutive primes (2113 + 2129 + 2131 and 883 + 887 + 907 + 911 + 919 + 929 + 937) 6397 – sum of three consecutive primes (2129 + 2131 + 2137) 6399 – smallest integer that cannot be expressed as a sum of fewer than 279 eighth powers
6400 to 6499
6400 = 802
6408 – sum of the squares of the first thirteen primes
6441 – triangular number
6449 – Sophie Germain prime
6466 – Markov number
6491 – Sophie Germain prime
6500 to 6599
6502 – model number of the MOS Technology 6502 which equipped early computers such as the Apple I and II, Commodore PET, Atari and others. 6509 – highly cototient number 6521 – Sophie Germain prime 6542 – number of primes . 6545 – tetrahedral number 6551 – Sophie Germain prime 6555 – triangular number 6556 – member of a Ruth-Aaron pair with 6557 (first definition) 6557 – member of a Ruth-Aaron pair with 6556 (first definition) 6561 = 812 = 94 = 38, perfect totient number, centered octagonal number 6563 – Sophie Germain prime 6581 – Sophie Germain prime 6599 – safe prime
6600 to 6699
6601 – Carmichael number, decagonal number
6623 – centered heptagonal number
6659 – safe prime
6666 – forty-fourth nonagonal number, and the 11th third-convolution of Fibonacci numbers. In Christian demonology it represents the number of demons in a legion of demons. 6670 – triangular number
6700 to 6799
6719 – safe prime, highly cototient number
6724 = 822
6728 – number of domino tilings of a 6×6 checkerboard
6761 – Sophie Germain prime
6765 – 20th Fibonacci number
6779 – safe prime
6786 – triangular number
6800 to 6899
6811 – member of a Ruth-Aaron pair with 6812 (first definition) 6812 – member of a Ruth-Aaron pair with 6811 (first definition) 6827 – safe prime 6841 - largest right-truncatable prime in base 7 6842 – number of parallelogram polyominoes with 12 cells 6859 = 193 6863 – balanced prime 6879 – number of planar partitions of 15 6880 – vampire number 6889 = 832, centered octagonal number 6899 – Sophie Germain prime, safe prime
