12664331664 has 40 divisors (see below), whose sum is σ = 32738029632. Its totient is φ = 4218625920.

The previous prime is 12664331657. The next prime is 12664331677. The reversal of 12664331664 is 46613346621.

It is a nude number because it is divisible by every one of its digits.

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, 14779 + ... + 159834.

Almost surely, 2^12664331664 is an apocalyptic number.

It is an amenable number.

12664331664 is an abundant number, since it is smaller than the sum of its proper divisors (20073697968).

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

12664331664 is a wasteful number, since it uses less digits than its factorization.

12664331664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176135 (or 176129 counting only the distinct ones).

The product of its digits is 373248, while the sum is 42.

The spelling of 12664331664 in words is "twelve billion, six hundred sixty-four million, three hundred thirty-one thousand, six hundred sixty-four".