668572 has 18 divisors (see below), whose sum is σ = 1237488. Its totient is φ = 316008.

The previous prime is 668567. The next prime is 668579. The reversal of 668572 is 275866.

668572 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 not an unprimeable number, because it can be changed into a prime (668579) by changing a digit.

668572 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1213 + ... + 1675.

2⁶⁶⁸⁵⁷² is an apocalyptic number.

It is an amenable number.

668572 is a deficient number, since it is larger than the sum of its proper divisors (568916).

668572 is a wasteful number, since it uses less digits than its factorization.

668572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 484 counting only the distinct ones).

The product of its digits is 20160, while the sum is 34.

The square root of 668572 is about 817.6625220713. The cubic root of 668572 is about 87.4411904143.

The spelling of 668572 in words is "six hundred sixty-eight thousand, five hundred seventy-two".