265976664 has 32 divisors (see below), whose sum is σ = 666325440. Its totient is φ = 88474400.

The previous prime is 265976663. The next prime is 265976671. The reversal of 265976664 is 466679562.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265976663) 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, 499 + ... + 23069.

It is an arithmetic number, because the mean of its divisors is an integer number (20822670).

Almost surely, 2^265976664 is an apocalyptic number.

265976664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

265976664 is an abundant number, since it is smaller than the sum of its proper divisors (400348776).

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

265976664 is a wasteful number, since it uses less digits than its factorization.

265976664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23071 (or 23067 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 51.

The square root of 265976664 is about 16308.7910036275. The cubic root of 265976664 is about 643.1039516798.

The spelling of 265976664 in words is "two hundred sixty-five million, nine hundred seventy-six thousand, six hundred sixty-four".