12659664 has 40 divisors (see below), whose sum is σ = 33053440. Its totient is φ = 4174848.

The previous prime is 12659657. The next prime is 12659677. The reversal of 12659664 is 46695621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3297 + ... + 6015.

It is an arithmetic number, because the mean of its divisors is an integer number (826336).

Almost surely, 2^12659664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12659664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16526720).

12659664 is an abundant number, since it is smaller than the sum of its proper divisors (20393776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12659664 is a wasteful number, since it uses less digits than its factorization.

12659664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2827 (or 2821 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The square root of 12659664 is about 3558.0421582663. The cubic root of 12659664 is about 233.0633903181.

The spelling of 12659664 in words is "twelve million, six hundred fifty-nine thousand, six hundred sixty-four".