977665764 has 48 divisors (see below), whose sum is σ = 2315264000. Its totient is φ = 321044256.

The previous prime is 977665751. The next prime is 977665769. The reversal of 977665764 is 467566779.

It is not an unprimeable number, because it can be changed into a prime (977665769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 574587 + ... + 576285.

Almost surely, 2^977665764 is an apocalyptic number.

It is an amenable number.

977665764 is an abundant number, since it is smaller than the sum of its proper divisors (1337598236).

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

977665764 is a wasteful number, since it uses less digits than its factorization.

977665764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392 (or 2390 counting only the distinct ones).

The product of its digits is 13335840, while the sum is 57.

The square root of 977665764 is about 31267.6472411980. The cubic root of 977665764 is about 992.4991323246.

The spelling of 977665764 in words is "nine hundred seventy-seven million, six hundred sixty-five thousand, seven hundred sixty-four".