13660637 has 2 divisors, whose sum is σ = 13660638. Its totient is φ = 13660636.

The previous prime is 13660609. The next prime is 13660649. The reversal of 13660637 is 73606631.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8375236 + 5285401 = 2894^2 + 2299^2 .

It is a cyclic number.

It is not a de Polignac number, because 13660637 - 2⁶ = 13660573 is a prime.

It is a super-2 number, since 2×13660637² = 373226006491538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13660337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6830318 + 6830319.

It is an arithmetic number, because the mean of its divisors is an integer number (6830319).

Almost surely, 2^13660637 is an apocalyptic number.

It is an amenable number.

13660637 is a deficient number, since it is larger than the sum of its proper divisors (1).

13660637 is an equidigital number, since it uses as much as digits as its factorization.

13660637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 13660637 is about 3696.0298970652. The cubic root of 13660637 is about 239.0508636340.

The spelling of 13660637 in words is "thirteen million, six hundred sixty thousand, six hundred thirty-seven".