13664157 has 12 divisors (see below), whose sum is σ = 19728864. Its totient is φ = 8408400.

The previous prime is 13664143. The next prime is 13664159. The reversal of 13664157 is 75146631.

13664157 = T₂₁₈ + T₂₁₉ + ... + T₄₅₁.

It is not a de Polignac number, because 13664157 - 2²² = 9469853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13664159) 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, 12969 + ... + 13982.

It is an arithmetic number, because the mean of its divisors is an integer number (1644072).

Almost surely, 2^13664157 is an apocalyptic number.

It is an amenable number.

13664157 is a deficient number, since it is larger than the sum of its proper divisors (6064707).

13664157 is a wasteful number, since it uses less digits than its factorization.

13664157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26980 (or 26967 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 13664157 is about 3696.5060530182. The cubic root of 13664157 is about 239.0713943207.

The spelling of 13664157 in words is "thirteen million, six hundred sixty-four thousand, one hundred fifty-seven".