12664605 has 16 divisors (see below), whose sum is σ = 21144960. Its totient is φ = 6460608.

The previous prime is 12664579. The next prime is 12664607. The reversal of 12664605 is 50646621.

It is not a de Polignac number, because 12664605 - 2¹⁸ = 12402461 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18010 + ... + 18699.

It is an arithmetic number, because the mean of its divisors is an integer number (1321560).

Almost surely, 2^12664605 is an apocalyptic number.

12664605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12664605 is a deficient number, since it is larger than the sum of its proper divisors (8480355).

12664605 is a wasteful number, since it uses less digits than its factorization.

12664605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36740.

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

The square root of 12664605 is about 3558.7364330616. The cubic root of 12664605 is about 233.0937075110.

The spelling of 12664605 in words is "twelve million, six hundred sixty-four thousand, six hundred five".