866607936856 has 16 divisors (see below), whose sum is σ = 1624991029200. Its totient is φ = 433276995744.

The previous prime is 866607936841. The next prime is 866607936863. The reversal of 866607936856 is 658639706668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3234711 + ... + 3492358.

It is an arithmetic number, because the mean of its divisors is an integer number (101561939325).

Almost surely, 2^866607936856 is an apocalyptic number.

It is an amenable number.

866607936856 is a deficient number, since it is larger than the sum of its proper divisors (758383092344).

866607936856 is a wasteful number, since it uses less digits than its factorization.

866607936856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6743178 (or 6743174 counting only the distinct ones).

The product of its (nonzero) digits is 470292480, while the sum is 70.

The spelling of 866607936856 in words is "eight hundred sixty-six billion, six hundred seven million, nine hundred thirty-six thousand, eight hundred fifty-six".