12660564 has 24 divisors (see below), whose sum is σ = 33761728. Its totient is φ = 3617280.

The previous prime is 12660553. The next prime is 12660569. The reversal of 12660564 is 46506621.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12660569) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 75277 + ... + 75444.

Almost surely, 2^12660564 is an apocalyptic number.

12660564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12660564 is an abundant number, since it is smaller than the sum of its proper divisors (21101164).

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

12660564 is a wasteful number, since it uses less digits than its factorization.

12660564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150735 (or 150733 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 12660564 is about 3558.1686300680. The cubic root of 12660564 is about 233.0689131629.

The spelling of 12660564 in words is "twelve million, six hundred sixty thousand, five hundred sixty-four".