866491317328 has 120 divisors (see below), whose sum is σ = 2194587537408. Its totient is φ = 327883868928.

The previous prime is 866491317319. The next prime is 866491317359. The reversal of 866491317328 is 823713194668.

866491317328 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1613776 + ... + 2082607.

Almost surely, 2^866491317328 is an apocalyptic number.

It is an amenable number.

866491317328 is an abundant number, since it is smaller than the sum of its proper divisors (1328096220080).

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

866491317328 is a wasteful number, since it uses less digits than its factorization.

866491317328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3696441 (or 3696428 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 58.

The spelling of 866491317328 in words is "eight hundred sixty-six billion, four hundred ninety-one million, three hundred seventeen thousand, three hundred twenty-eight".