13662564 has 12 divisors (see below), whose sum is σ = 31879344. Its totient is φ = 4554184.

The previous prime is 13662557. The next prime is 13662581. The reversal of 13662564 is 46526631.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569262 + ... + 569285.

It is an arithmetic number, because the mean of its divisors is an integer number (2656612).

Almost surely, 2^13662564 is an apocalyptic number.

It is an amenable number.

13662564 is an abundant number, since it is smaller than the sum of its proper divisors (18216780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13662564 is a wasteful number, since it uses less digits than its factorization.

13662564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138554 (or 1138552 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 13662564 is about 3696.2905729934. The cubic root of 13662564 is about 239.0621034553.

The spelling of 13662564 in words is "thirteen million, six hundred sixty-two thousand, five hundred sixty-four".