12664005 has 16 divisors (see below), whose sum is σ = 20566464. Its totient is φ = 6652800.

The previous prime is 12663991. The next prime is 12664019. The reversal of 12664005 is 50046621.

It is an interprime number because it is at equal distance from previous prime (12663991) and next prime (12664019).

It is not a de Polignac number, because 12664005 - 2⁷ = 12663877 is a prime.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 5296 + ... + 7305.

It is an arithmetic number, because the mean of its divisors is an integer number (1285404).

Almost surely, 2^12664005 is an apocalyptic number.

12664005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12664005 is a deficient number, since it is larger than the sum of its proper divisors (7902459).

12664005 is a wasteful number, since it uses less digits than its factorization.

12664005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12676.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 12664005 is about 3558.6521324794. The cubic root of 12664005 is about 233.0900264267.

The spelling of 12664005 in words is "twelve million, six hundred sixty-four thousand, five".