664663177512274 has 16 divisors (see below), whose sum is σ = 1049499282535200. Its totient is φ = 314831120251104.

The previous prime is 664663177512263. The next prime is 664663177512289. The reversal of 664663177512274 is 472215771366466.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257930347 + ... + 260494510.

It is an arithmetic number, because the mean of its divisors is an integer number (65593705158450).

Almost surely, 2^{664663177512274} is an apocalyptic number.

664663177512274 is a deficient number, since it is larger than the sum of its proper divisors (384836105022926).

664663177512274 is a wasteful number, since it uses less digits than its factorization.

664663177512274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518458617.

The product of its digits is 426746880, while the sum is 67.

The spelling of 664663177512274 in words is "six hundred sixty-four trillion, six hundred sixty-three billion, one hundred seventy-seven million, five hundred twelve thousand, two hundred seventy-four".