664455766732466 has 16 divisors (see below), whose sum is σ = 1049141991146400. Its totient is φ = 314741813244768.

The previous prime is 664455766732423. The next prime is 664455766732487. The reversal of 664455766732466 is 664237667554466.

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, 21249881 + ... + 42195603.

It is an arithmetic number, because the mean of its divisors is an integer number (65571374446650).

Almost surely, 2^{664455766732466} is an apocalyptic number.

664455766732466 is a deficient number, since it is larger than the sum of its proper divisors (384686224413934).

664455766732466 is a wasteful number, since it uses less digits than its factorization.

664455766732466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21780553.

The product of its digits is 21946982400, while the sum is 77.

The spelling of 664455766732466 in words is "six hundred sixty-four trillion, four hundred fifty-five billion, seven hundred sixty-six million, seven hundred thirty-two thousand, four hundred sixty-six".