12784664 has 16 divisors (see below), whose sum is σ = 24145800. Its totient is φ = 6345792.

The previous prime is 12784643. The next prime is 12784687. The reversal of 12784664 is 46648721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4637 + ... + 6860.

Almost surely, 2^12784664 is an apocalyptic number.

It is an amenable number.

12784664 is a deficient number, since it is larger than the sum of its proper divisors (11361136).

12784664 is a wasteful number, since it uses less digits than its factorization.

12784664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11642 (or 11638 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 12784664 is about 3575.5648504817. The cubic root of 12784664 is about 233.8279593549.

The spelling of 12784664 in words is "twelve million, seven hundred eighty-four thousand, six hundred sixty-four".