12664444505 has 8 divisors (see below), whose sum is σ = 15204134400. Its totient is φ = 10127021616.

The previous prime is 12664444501. The next prime is 12664444511. The reversal of 12664444505 is 50544446621.

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

It is a cyclic number.

It is not a de Polignac number, because 12664444505 - 2² = 12664444501 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12664444501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554435 + ... + 576824.

It is an arithmetic number, because the mean of its divisors is an integer number (1900516800).

Almost surely, 2^12664444505 is an apocalyptic number.

It is an amenable number.

12664444505 is a deficient number, since it is larger than the sum of its proper divisors (2539689895).

12664444505 is a wasteful number, since it uses less digits than its factorization.

12664444505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133503.

The product of its (nonzero) digits is 460800, while the sum is 41.

The spelling of 12664444505 in words is "twelve billion, six hundred sixty-four million, four hundred forty-four thousand, five hundred five".