666968 has 16 divisors (see below), whose sum is σ = 1259280. Its totient is φ = 331168.

The previous prime is 666959. The next prime is 666979. The reversal of 666968 is 869666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1946 + ... + 2262.

It is an arithmetic number, because the mean of its divisors is an integer number (78705).

2⁶⁶⁶⁹⁶⁸ is an apocalyptic number.

It is an amenable number.

666968 is a deficient number, since it is larger than the sum of its proper divisors (592312).

666968 is a wasteful number, since it uses less digits than its factorization.

666968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586 (or 582 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 666968 is about 816.6810883080. The cubic root of 666968 is about 87.3712064367.

The spelling of 666968 in words is "six hundred sixty-six thousand, nine hundred sixty-eight".