668518627264 has 28 divisors (see below), whose sum is σ = 1326859900504. Its totient is φ = 334191723264.

The previous prime is 668518627229. The next prime is 668518627297. The reversal of 668518627264 is 462726815866.

668518627264 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 736374 + ... + 1370869.

Almost surely, 2^668518627264 is an apocalyptic number.

668518627264 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

668518627264 is a deficient number, since it is larger than the sum of its proper divisors (658341273240).

668518627264 is a wasteful number, since it uses less digits than its factorization.

668518627264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2112212 (or 2112202 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 61.

The spelling of 668518627264 in words is "six hundred sixty-eight billion, five hundred eighteen million, six hundred twenty-seven thousand, two hundred sixty-four".