977639660 has 24 divisors (see below), whose sum is σ = 2066828400. Its totient is φ = 388430144.

The previous prime is 977639657. The next prime is 977639693. The reversal of 977639660 is 66936779.

977639660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161054 + ... + 167013.

It is an arithmetic number, because the mean of its divisors is an integer number (86117850).

Almost surely, 2^977639660 is an apocalyptic number.

It is an amenable number.

977639660 is an abundant number, since it is smaller than the sum of its proper divisors (1089188740).

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

977639660 is a wasteful number, since it uses less digits than its factorization.

977639660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328225 (or 328223 counting only the distinct ones).

The product of its (nonzero) digits is 2571912, while the sum is 53.

The square root of 977639660 is about 31267.2298101383. The cubic root of 977639660 is about 992.4902988940.

The spelling of 977639660 in words is "nine hundred seventy-seven million, six hundred thirty-nine thousand, six hundred sixty".