866444010864 has 40 divisors (see below), whose sum is σ = 2245464895632. Its totient is φ = 287891934720.

The previous prime is 866444010841. The next prime is 866444010899. The reversal of 866444010864 is 468010444668.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28820307 + ... + 28850354.

Almost surely, 2^866444010864 is an apocalyptic number.

It is an amenable number.

866444010864 is an abundant number, since it is smaller than the sum of its proper divisors (1379020884768).

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

866444010864 is a wasteful number, since it uses less digits than its factorization.

866444010864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57670985 (or 57670979 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 51.

The spelling of 866444010864 in words is "eight hundred sixty-six billion, four hundred forty-four million, ten thousand, eight hundred sixty-four".