12664672556 has 12 divisors (see below), whose sum is σ = 22174255992. Its totient is φ = 6329170848.

The previous prime is 12664672487. The next prime is 12664672571. The reversal of 12664672556 is 65527646621.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 782345 + ... + 798368.

It is an arithmetic number, because the mean of its divisors is an integer number (1847854666).

Almost surely, 2^12664672556 is an apocalyptic number.

It is an amenable number.

12664672556 is a deficient number, since it is larger than the sum of its proper divisors (9509583436).

12664672556 is a wasteful number, since it uses less digits than its factorization.

12664672556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582720 (or 1582718 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 50.

The spelling of 12664672556 in words is "twelve billion, six hundred sixty-four million, six hundred seventy-two thousand, five hundred fifty-six".