12664580 has 24 divisors (see below), whose sum is σ = 26664792. Its totient is φ = 5052672.

The previous prime is 12664579. The next prime is 12664607. The reversal of 12664580 is 8546621.

It can be written as a sum of positive squares in 4 ways, for example, as 817216 + 11847364 = 904^2 + 3442^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11744 + ... + 12776.

It is an arithmetic number, because the mean of its divisors is an integer number (1111033).

Almost surely, 2^12664580 is an apocalyptic number.

12664580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12664580 is an abundant number, since it is smaller than the sum of its proper divisors (14000212).

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

12664580 is a wasteful number, since it uses less digits than its factorization.

12664580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655 (or 1653 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 12664580 is about 3558.7329205772. The cubic root of 12664580 is about 233.0935541348.

The spelling of 12664580 in words is "twelve million, six hundred sixty-four thousand, five hundred eighty".