668452 has 6 divisors (see below), whose sum is σ = 1169798. Its totient is φ = 334224.

The previous prime is 668417. The next prime is 668471. The reversal of 668452 is 254866.

It can be written as a sum of positive squares in only one way, i.e., 527076 + 141376 = 726^2 + 376^2 .

It is an unprimeable number.

668452 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 as a sum of consecutive naturals, namely, 83553 + ... + 83560.

2⁶⁶⁸⁴⁵² is an apocalyptic number.

It is an amenable number.

668452 is a deficient number, since it is larger than the sum of its proper divisors (501346).

668452 is a wasteful number, since it uses less digits than its factorization.

668452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167117 (or 167115 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 668452 is about 817.5891388711. The cubic root of 668452 is about 87.4359585816.

The spelling of 668452 in words is "six hundred sixty-eight thousand, four hundred fifty-two".