668072 has 24 divisors (see below), whose sum is σ = 1308510. Its totient is φ = 319680.

The previous prime is 668069. The next prime is 668089. The reversal of 668072 is 270866.

It can be written as a sum of positive squares in 3 ways, for example, as 630436 + 37636 = 794^2 + 194^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 668072.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10922 + ... + 10982.

2⁶⁶⁸⁰⁷² is an apocalyptic number.

It is an amenable number.

668072 is a deficient number, since it is larger than the sum of its proper divisors (640438).

668072 is a wasteful number, since it uses less digits than its factorization.

668072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141 (or 100 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 668072 is about 817.3567152719. The cubic root of 668072 is about 87.4193869792.

The spelling of 668072 in words is "six hundred sixty-eight thousand, seventy-two".