13656656 has 20 divisors (see below), whose sum is σ = 28495572. Its totient is φ = 6302976.

The previous prime is 13656653. The next prime is 13656673. The reversal of 13656656 is 65665631.

It can be written as a sum of positive squares in 2 ways, for example, as 8904256 + 4752400 = 2984^2 + 2180^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13656653) 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, 32621 + ... + 33036.

Almost surely, 2^13656656 is an apocalyptic number.

13656656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13656656 is an abundant number, since it is smaller than the sum of its proper divisors (14838916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13656656 is a wasteful number, since it uses less digits than its factorization.

13656656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65678 (or 65672 counting only the distinct ones).

The product of its digits is 97200, while the sum is 38.

The square root of 13656656 is about 3695.4913069848. The cubic root of 13656656 is about 239.0276398769.

The spelling of 13656656 in words is "thirteen million, six hundred fifty-six thousand, six hundred fifty-six".