12864664 has 8 divisors (see below), whose sum is σ = 24121260. Its totient is φ = 6432328.

The previous prime is 12864623. The next prime is 12864667. The reversal of 12864664 is 46646821.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12864667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 804034 + ... + 804049.

Almost surely, 2^12864664 is an apocalyptic number.

It is an amenable number.

12864664 is a deficient number, since it is larger than the sum of its proper divisors (11256596).

12864664 is a wasteful number, since it uses less digits than its factorization.

12864664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608089 (or 1608085 counting only the distinct ones).

The product of its digits is 55296, while the sum is 37.

The square root of 12864664 is about 3586.7344479345. The cubic root of 12864664 is about 234.3146715008.

The spelling of 12864664 in words is "twelve million, eight hundred sixty-four thousand, six hundred sixty-four".