816858366 has 32 divisors (see below), whose sum is σ = 1672151040. Its totient is φ = 265927584.

The previous prime is 816858349. The next prime is 816858373. The reversal of 816858366 is 663858618.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65155 + ... + 76673.

It is an arithmetic number, because the mean of its divisors is an integer number (52254720).

Almost surely, 2^816858366 is an apocalyptic number.

816858366 is an abundant number, since it is smaller than the sum of its proper divisors (855292674).

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

816858366 is a wasteful number, since it uses less digits than its factorization.

816858366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11800.

The product of its digits is 1658880, while the sum is 51.

The square root of 816858366 is about 28580.7341753147. The cubic root of 816858366 is about 934.7932916415.

The spelling of 816858366 in words is "eight hundred sixteen million, eight hundred fifty-eight thousand, three hundred sixty-six".