668322072 has 48 divisors (see below), whose sum is σ = 1974590280. Its totient is φ = 202521600.

The previous prime is 668322049. The next prime is 668322113. The reversal of 668322072 is 270223866.

668322072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 421129 + ... + 422712.

Almost surely, 2^668322072 is an apocalyptic number.

It is an amenable number.

668322072 is an abundant number, since it is smaller than the sum of its proper divisors (1306268208).

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

668322072 is a wasteful number, since it uses less digits than its factorization.

668322072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843864 (or 843857 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 668322072 is about 25851.9258857053. The cubic root of 668322072 is about 874.3029319580.

The spelling of 668322072 in words is "six hundred sixty-eight million, three hundred twenty-two thousand, seventy-two".