12644666 has 8 divisors (see below), whose sum is σ = 19408224. Its totient is φ = 6175260.

The previous prime is 12644591. The next prime is 12644669. The reversal of 12644666 is 66644621.

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

It is not an unprimeable number, because it can be changed into a prime (12644669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73430 + ... + 73601.

It is an arithmetic number, because the mean of its divisors is an integer number (2426028).

Almost surely, 2^12644666 is an apocalyptic number.

12644666 is a deficient number, since it is larger than the sum of its proper divisors (6763558).

12644666 is a wasteful number, since it uses less digits than its factorization.

12644666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147076.

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

The square root of 12644666 is about 3555.9339138966. The cubic root of 12644666 is about 232.9713166260.

The spelling of 12644666 in words is "twelve million, six hundred forty-four thousand, six hundred sixty-six".