668392 has 32 divisors (see below), whose sum is σ = 1346400. Its totient is φ = 310464.

The previous prime is 668347. The next prime is 668407. The reversal of 668392 is 293866.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9943 + ... + 10009.

It is an arithmetic number, because the mean of its divisors is an integer number (42075).

2⁶⁶⁸³⁹² is an apocalyptic number.

It is an amenable number.

668392 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

668392 is a wasteful number, since it uses less digits than its factorization.

668392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 141 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 668392 is about 817.5524448009. The cubic root of 668392 is about 87.4333424304.

The spelling of 668392 in words is "six hundred sixty-eight thousand, three hundred ninety-two".