977766664 has 32 divisors (see below), whose sum is σ = 2097155520. Its totient is φ = 418654656.

The previous prime is 977766659. The next prime is 977766667. The reversal of 977766664 is 466667779.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 977766599 and 977766608.

It is not an unprimeable number, because it can be changed into a prime (977766667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57622 + ... + 72634.

It is an arithmetic number, because the mean of its divisors is an integer number (65536110).

Almost surely, 2^977766664 is an apocalyptic number.

It is an amenable number.

977766664 is an abundant number, since it is smaller than the sum of its proper divisors (1119388856).

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

977766664 is a wasteful number, since it uses less digits than its factorization.

977766664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16189 (or 16185 counting only the distinct ones).

The product of its digits is 16003008, while the sum is 58.

The square root of 977766664 is about 31269.2606884141. The cubic root of 977766664 is about 992.5332747760.

The spelling of 977766664 in words is "nine hundred seventy-seven million, seven hundred sixty-six thousand, six hundred sixty-four".