668307936912 has 240 divisors, whose sum is σ = 2228048467200. Its totient is φ = 170643943680.

The previous prime is 668307936893. The next prime is 668307936913. The reversal of 668307936912 is 219639703866.

It is a hoax number, since the sum of its digits (60) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (668307936913) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1307539 + ... + 1745357.

It is an arithmetic number, because the mean of its divisors is an integer number (9283535280).

Almost surely, 2^668307936912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668307936912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1114024233600).

668307936912 is an abundant number, since it is smaller than the sum of its proper divisors (1559740530288).

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

668307936912 is a wasteful number, since it uses less digits than its factorization.

668307936912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437914 (or 437901 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 60.

The spelling of 668307936912 in words is "six hundred sixty-eight billion, three hundred seven million, nine hundred thirty-six thousand, nine hundred twelve".