664663177512275 has 6 divisors (see below), whose sum is σ = 824182340115252. Its totient is φ = 531730542009800.

The previous prime is 664663177512263. The next prime is 664663177512289. The reversal of 664663177512275 is 572215771366466.

It is a happy number.

It is not a de Polignac number, because 664663177512275 - 2⁴ = 664663177512259 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13293263550221 + ... + 13293263550270.

It is an arithmetic number, because the mean of its divisors is an integer number (137363723352542).

Almost surely, 2^{664663177512275} is an apocalyptic number.

664663177512275 is a deficient number, since it is larger than the sum of its proper divisors (159519162602977).

664663177512275 is a wasteful number, since it uses less digits than its factorization.

664663177512275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26586527100501 (or 26586527100496 counting only the distinct ones).

The product of its digits is 533433600, while the sum is 68.

The spelling of 664663177512275 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-five".