668734007480 has 128 divisors (see below), whose sum is σ = 1878611304960. Its totient is φ = 208138560000.

The previous prime is 668734007479. The next prime is 668734007507. The reversal of 668734007480 is 84700437866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2004215 + ... + 2313945.

It is an arithmetic number, because the mean of its divisors is an integer number (14676650820).

Almost surely, 2^668734007480 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 668734007480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (939305652480).

668734007480 is an abundant number, since it is smaller than the sum of its proper divisors (1209877297480).

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

668734007480 is a wasteful number, since it uses less digits than its factorization.

668734007480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310461 (or 310457 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 53.

The spelling of 668734007480 in words is "six hundred sixty-eight billion, seven hundred thirty-four million, seven thousand, four hundred eighty".