668011708 has 144 divisors (see below), whose sum is σ = 1533100800. Its totient is φ = 254270016.

The previous prime is 668011693. The next prime is 668011717. The reversal of 668011708 is 807110866.

668011708 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 47 ways as a sum of consecutive naturals, for example, 9970291 + ... + 9970357.

Almost surely, 2^668011708 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 668011708, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (766550400).

668011708 is an abundant number, since it is smaller than the sum of its proper divisors (865089092).

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

668011708 is a wasteful number, since it uses less digits than its factorization.

668011708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 668011708 is about 25845.9224637079. The cubic root of 668011708 is about 874.1675709886.

The spelling of 668011708 in words is "six hundred sixty-eight million, eleven thousand, seven hundred eight".