668793452 has 12 divisors (see below), whose sum is σ = 1171555560. Its totient is φ = 334063296.

The previous prime is 668793427. The next prime is 668793487. The reversal of 668793452 is 254397866.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 668793452.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78818 + ... + 86889.

It is an arithmetic number, because the mean of its divisors is an integer number (97629630).

Almost surely, 2^668793452 is an apocalyptic number.

It is an amenable number.

668793452 is a deficient number, since it is larger than the sum of its proper divisors (502762108).

668793452 is a wasteful number, since it uses less digits than its factorization.

668793452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166720 (or 166718 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 50.

The square root of 668793452 is about 25861.0412010035. The cubic root of 668793452 is about 874.5084376951.

The spelling of 668793452 in words is "six hundred sixty-eight million, seven hundred ninety-three thousand, four hundred fifty-two".