664577730124772 has 24 divisors (see below), whose sum is σ = 1173883139462880. Its totient is φ = 329182562499840.

The previous prime is 664577730124769. The next prime is 664577730124811. The reversal of 664577730124772 is 277421037775466.

It is a happy 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, 199805447 + ... + 203104337.

It is an arithmetic number, because the mean of its divisors is an integer number (48911797477620).

Almost surely, 2^{664577730124772} is an apocalyptic number.

It is an amenable number.

664577730124772 is a deficient number, since it is larger than the sum of its proper divisors (509305409338108).

664577730124772 is a wasteful number, since it uses less digits than its factorization.

664577730124772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3769691 (or 3769689 counting only the distinct ones).

The product of its (nonzero) digits is 580849920, while the sum is 68.

The spelling of 664577730124772 in words is "six hundred sixty-four trillion, five hundred seventy-seven billion, seven hundred thirty million, one hundred twenty-four thousand, seven hundred seventy-two".