664504400263 has 6 divisors (see below), whose sum is σ = 730405663232. Its totient is φ = 604094909220.

The previous prime is 664504400243. The next prime is 664504400267. The reversal of 664504400263 is 362004405466.

It is a de Polignac number, because none of the positive numbers 2^k-664504400263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664504400267) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2745885831 + ... + 2745886072.

Almost surely, 2^664504400263 is an apocalyptic number.

664504400263 is a deficient number, since it is larger than the sum of its proper divisors (65901262969).

664504400263 is a wasteful number, since it uses less digits than its factorization.

664504400263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5491771925 (or 5491771914 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 40.

The spelling of 664504400263 in words is "six hundred sixty-four billion, five hundred four million, four hundred thousand, two hundred sixty-three".