12664646 has 8 divisors (see below), whose sum is σ = 19017504. Its totient is φ = 6325480.

The previous prime is 12664607. The next prime is 12664669. The reversal of 12664646 is 64646621.

12664646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 665 + ... + 5076.

It is an arithmetic number, because the mean of its divisors is an integer number (2377188).

Almost surely, 2^12664646 is an apocalyptic number.

12664646 is a deficient number, since it is larger than the sum of its proper divisors (6352858).

12664646 is a wasteful number, since it uses less digits than its factorization.

12664646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6846.

The product of its digits is 41472, while the sum is 35.

The square root of 12664646 is about 3558.7421935285. The cubic root of 12664646 is about 233.0939590475.

The spelling of 12664646 in words is "twelve million, six hundred sixty-four thousand, six hundred forty-six".