13668651 has 12 divisors (see below), whose sum is σ = 20277712. Its totient is φ = 8865936.

The previous prime is 13668637. The next prime is 13668653. The reversal of 13668651 is 15686631.

It is a happy number.

It is not a de Polignac number, because 13668651 - 2¹⁰ = 13667627 is a prime.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 20191 + ... + 20856.

Almost surely, 2^13668651 is an apocalyptic number.

13668651 is a deficient number, since it is larger than the sum of its proper divisors (6609061).

13668651 is a wasteful number, since it uses less digits than its factorization.

13668651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41090 (or 41087 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 13668651 is about 3697.1138743620. The cubic root of 13668651 is about 239.0976008181.

The spelling of 13668651 in words is "thirteen million, six hundred sixty-eight thousand, six hundred fifty-one".