13660623 has 8 divisors (see below), whose sum is σ = 20238000. Its totient is φ = 9107064.

The previous prime is 13660609. The next prime is 13660637. The reversal of 13660623 is 32606631.

13660623 is a `hidden beast` number, since 1 + 36 + 6 + 0 + 623 = 666.

It is an interprime number because it is at equal distance from previous prime (13660609) and next prime (13660637).

It is not a de Polignac number, because 13660623 - 2¹⁰ = 13659599 is a prime.

It is a super-2 number, since 2×13660623² = 373225241496258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 505949 = 13660623 / (1 + 3 + 6 + 6 + 0 + 6 + 2 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13660663) 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 in 7 ways as a sum of consecutive naturals, for example, 252948 + ... + 253001.

It is an arithmetic number, because the mean of its divisors is an integer number (2529750).

Almost surely, 2^13660623 is an apocalyptic number.

13660623 is a deficient number, since it is larger than the sum of its proper divisors (6577377).

13660623 is an equidigital number, since it uses as much as digits as its factorization.

13660623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505958 (or 505952 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 13660623 is about 3696.0280031407. The cubic root of 13660623 is about 239.0507819708.

The spelling of 13660623 in words is "thirteen million, six hundred sixty thousand, six hundred twenty-three".