667708 has 12 divisors (see below), whose sum is σ = 1183840. Its totient is φ = 329472.

The previous prime is 667699. The next prime is 667727. The reversal of 667708 is 807766.

It is a congruent number.

It is an unprimeable number.

667708 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 3 ways as a sum of consecutive naturals, for example, 741 + ... + 1372.

2⁶⁶⁷⁷⁰⁸ is an apocalyptic number.

It is an amenable number.

667708 is a deficient number, since it is larger than the sum of its proper divisors (516132).

667708 is a wasteful number, since it uses less digits than its factorization.

667708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196 (or 2194 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 667708 is about 817.1340159362. The cubic root of 667708 is about 87.4035072348.

The spelling of 667708 in words is "six hundred sixty-seven thousand, seven hundred eight".