12664636 has 6 divisors (see below), whose sum is σ = 22163120. Its totient is φ = 6332316.

The previous prime is 12664607. The next prime is 12664669. The reversal of 12664636 is 63646621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1583076 + ... + 1583083.

Almost surely, 2^12664636 is an apocalyptic number.

It is an amenable number.

12664636 is a deficient number, since it is larger than the sum of its proper divisors (9498484).

12664636 is a wasteful number, since it uses less digits than its factorization.

12664636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3166163 (or 3166161 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

The square root of 12664636 is about 3558.7407885374. The cubic root of 12664636 is about 233.0938976972.

The spelling of 12664636 in words is "twelve million, six hundred sixty-four thousand, six hundred thirty-six".