12660656 has 10 divisors (see below), whose sum is σ = 24530052. Its totient is φ = 6330320.

The previous prime is 12660647. The next prime is 12660667. The reversal of 12660656 is 65606621.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395630 + ... + 395661.

Almost surely, 2^12660656 is an apocalyptic number.

12660656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12660656 is a deficient number, since it is larger than the sum of its proper divisors (11869396).

12660656 is an equidigital number, since it uses as much as digits as its factorization.

12660656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791299 (or 791293 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 12660656 is about 3558.1815580434. The cubic root of 12660656 is about 233.0694777056.

The spelling of 12660656 in words is "twelve million, six hundred sixty thousand, six hundred fifty-six".