12856664 has 8 divisors (see below), whose sum is σ = 24106260. Its totient is φ = 6428328.

The previous prime is 12856651. The next prime is 12856667. The reversal of 12856664 is 46665821.

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 (12856667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 803534 + ... + 803549.

Almost surely, 2^12856664 is an apocalyptic number.

It is an amenable number.

12856664 is a deficient number, since it is larger than the sum of its proper divisors (11249596).

12856664 is a wasteful number, since it uses less digits than its factorization.

12856664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1607089 (or 1607085 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 12856664 is about 3585.6190539431. The cubic root of 12856664 is about 234.2660912434.

The spelling of 12856664 in words is "twelve million, eight hundred fifty-six thousand, six hundred sixty-four".