13660425 has 36 divisors (see below), whose sum is σ = 24736140. Its totient is φ = 7205760.

The previous prime is 13660403. The next prime is 13660441. The reversal of 13660425 is 52406631.

13660425 is a `hidden beast` number, since 1 + 36 + 604 + 25 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1065024 + 12595401 = 1032^2 + 3549^2 .

It is not a de Polignac number, because 13660425 - 2⁵ = 13660393 is a prime.

It is a super-2 number, since 2×13660425² = 373214422361250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 24247 + ... + 24803.

It is an arithmetic number, because the mean of its divisors is an integer number (687115).

Almost surely, 2^13660425 is an apocalyptic number.

13660425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13660425 is a deficient number, since it is larger than the sum of its proper divisors (11075715).

13660425 is a wasteful number, since it uses less digits than its factorization.

13660425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682 (or 674 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 13660425 is about 3696.0012175323. The cubic root of 13660425 is about 239.0496270141.

The spelling of 13660425 in words is "thirteen million, six hundred sixty thousand, four hundred twenty-five".