12656655 has 48 divisors (see below), whose sum is σ = 24845184. Its totient is φ = 6130080.

The previous prime is 12656639. The next prime is 12656671. The reversal of 12656655 is 55665621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12656639) and next prime (12656671).

It is not a de Polignac number, because 12656655 - 2⁴ = 12656639 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12892 + ... + 13838.

It is an arithmetic number, because the mean of its divisors is an integer number (517608).

Almost surely, 2^12656655 is an apocalyptic number.

12656655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12656655 is a deficient number, since it is larger than the sum of its proper divisors (12188529).

12656655 is an equidigital number, since it uses as much as digits as its factorization.

12656655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978 (or 966 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 12656655 is about 3557.6192882319. The cubic root of 12656655 is about 233.0449237060.

It can be divided in two parts, 126566 and 55, that added together give a palindrome (126621).

The spelling of 12656655 in words is "twelve million, six hundred fifty-six thousand, six hundred fifty-five".