12665656 has 16 divisors (see below), whose sum is σ = 23882040. Its totient is φ = 6297120.

The previous prime is 12665651. The next prime is 12665657. The reversal of 12665656 is 65656621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12665651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2926 + ... + 5821.

Almost surely, 2^12665656 is an apocalyptic number.

It is an amenable number.

12665656 is a deficient number, since it is larger than the sum of its proper divisors (11216384).

12665656 is a wasteful number, since it uses less digits than its factorization.

12665656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8934 (or 8930 counting only the distinct ones).

The product of its digits is 64800, while the sum is 37.

The square root of 12665656 is about 3558.8840947690. The cubic root of 12665656 is about 233.1001552633.

The spelling of 12665656 in words is "twelve million, six hundred sixty-five thousand, six hundred fifty-six".