818797866 has 16 divisors (see below), whose sum is σ = 1642161600. Its totient is φ = 272171648.

The previous prime is 818797831. The next prime is 818797879. The reversal of 818797866 is 668797818.

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, 187911 + ... + 192218.

It is an arithmetic number, because the mean of its divisors is an integer number (102635100).

Almost surely, 2^818797866 is an apocalyptic number.

818797866 is an abundant number, since it is smaller than the sum of its proper divisors (823363734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

818797866 is a wasteful number, since it uses less digits than its factorization.

818797866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380493.

The product of its digits is 8128512, while the sum is 60.

The square root of 818797866 is about 28614.6442577922. The cubic root of 818797866 is about 935.5325460974.

The spelling of 818797866 in words is "eight hundred eighteen million, seven hundred ninety-seven thousand, eight hundred sixty-six".