806

806 = 2 x 13 x 31.

806 is not the sum of a square, a cube, a fourth power, and a fifth power.

806 expressed in base 3 (1002212) and base 4 (30212) ends in 212. 806 is 11211 in base 5 (A029952).

806 is the sum of 12 positive fifth powers (A003357).

806 is a magic constant of a 6 x 6 magic square composed of consecutive primes (A177434).

806 and the 806th prime (6199) have only the digit 6 in common (A107937).

Source: What's Special About This Number?