877665664 has 32 divisors (see below), whose sum is σ = 1851330600. Its totient is φ = 413018112.

The previous prime is 877665623. The next prime is 877665673. The reversal of 877665664 is 466566778.

It is a tau number, because it is divible by the number of its divisors (32).

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, 199494 + ... + 203845.

Almost surely, 2^877665664 is an apocalyptic number.

It is an amenable number.

877665664 is an abundant number, since it is smaller than the sum of its proper divisors (973664936).

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

877665664 is a wasteful number, since it uses less digits than its factorization.

877665664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403370 (or 403358 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 55.

The square root of 877665664 is about 29625.4225961420. The cubic root of 877665664 is about 957.4358889691.

The spelling of 877665664 in words is "eight hundred seventy-seven million, six hundred sixty-five thousand, six hundred sixty-four".