855966818 has 16 divisors (see below), whose sum is σ = 1469757120. Its totient is φ = 366246576.

The previous prime is 855966803. The next prime is 855966851. The reversal of 855966818 is 818669558.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40721 + ... + 58052.

It is an arithmetic number, because the mean of its divisors is an integer number (91859820).

Almost surely, 2^855966818 is an apocalyptic number.

855966818 is a deficient number, since it is larger than the sum of its proper divisors (613790302).

855966818 is a wasteful number, since it uses less digits than its factorization.

855966818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99401.

The product of its digits is 4147200, while the sum is 56.

The square root of 855966818 is about 29256.9106024543. The cubic root of 855966818 is about 949.4796108392.

The spelling of 855966818 in words is "eight hundred fifty-five million, nine hundred sixty-six thousand, eight hundred eighteen".