13660564 has 12 divisors (see below), whose sum is σ = 24040800. Its totient is φ = 6791768.

The previous prime is 13660561. The next prime is 13660573. The reversal of 13660564 is 46506631.

It is a super-2 number, since 2×13660564² = 373222017596192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13660561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8824 + ... + 10255.

It is an arithmetic number, because the mean of its divisors is an integer number (2003400).

Almost surely, 2^13660564 is an apocalyptic number.

It is an amenable number.

13660564 is a deficient number, since it is larger than the sum of its proper divisors (10380236).

13660564 is a wasteful number, since it uses less digits than its factorization.

13660564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19262 (or 19260 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 13660564 is about 3696.0200215908. The cubic root of 13660564 is about 239.0504378182.

The spelling of 13660564 in words is "thirteen million, six hundred sixty thousand, five hundred sixty-four".