13668657 has 16 divisors (see below), whose sum is σ = 19848000. Its totient is φ = 8334144.

The previous prime is 13668653. The next prime is 13668661. The reversal of 13668657 is 75686631.

It is an interprime number because it is at equal distance from previous prime (13668653) and next prime (13668661).

It is not a de Polignac number, because 13668657 - 2² = 13668653 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13668653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2482 + ... + 5787.

It is an arithmetic number, because the mean of its divisors is an integer number (1240500).

Almost surely, 2^13668657 is an apocalyptic number.

It is an amenable number.

13668657 is a deficient number, since it is larger than the sum of its proper divisors (6179343).

13668657 is a wasteful number, since it uses less digits than its factorization.

13668657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8320.

The product of its digits is 181440, while the sum is 42.

The square root of 13668657 is about 3697.1146858057. The cubic root of 13668657 is about 239.0976358029.

The spelling of 13668657 in words is "thirteen million, six hundred sixty-eight thousand, six hundred fifty-seven".