12664816 has 20 divisors (see below), whose sum is σ = 24633592. Its totient is φ = 6307776.

The previous prime is 12664807. The next prime is 12664829. The reversal of 12664816 is 61846621.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3130 + ... + 5926.

Almost surely, 2^12664816 is an apocalyptic number.

12664816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12664816 is a deficient number, since it is larger than the sum of its proper divisors (11968776).

12664816 is a wasteful number, since it uses less digits than its factorization.

12664816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3088 (or 3082 counting only the distinct ones).

The product of its digits is 13824, while the sum is 34.

The square root of 12664816 is about 3558.7660782917. The cubic root of 12664816 is about 233.0950019980.

The spelling of 12664816 in words is "twelve million, six hundred sixty-four thousand, eight hundred sixteen".