668474208384 has 32 divisors (see below), whose sum is σ = 1775634617040. Its totient is φ = 222824736000.

The previous prime is 668474208379. The next prime is 668474208407. The reversal of 668474208384 is 483802474866.

It is a tau number, because it is divible by the number of its divisors (32).

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, 870408742 + ... + 870409509.

Almost surely, 2^668474208384 is an apocalyptic number.

668474208384 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

668474208384 is an abundant number, since it is smaller than the sum of its proper divisors (1107160408656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668474208384 is a wasteful number, since it uses less digits than its factorization.

668474208384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740818268 (or 1740818256 counting only the distinct ones).

The product of its (nonzero) digits is 49545216, while the sum is 60.

The spelling of 668474208384 in words is "six hundred sixty-eight billion, four hundred seventy-four million, two hundred eight thousand, three hundred eighty-four".