667596 has 12 divisors (see below), whose sum is σ = 1557752. Its totient is φ = 222528.

The previous prime is 667577. The next prime is 667631. The reversal of 667596 is 695766.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27805 + ... + 27828.

2⁶⁶⁷⁵⁹⁶ is an apocalyptic number.

It is an amenable number.

667596 is an abundant number, since it is smaller than the sum of its proper divisors (890156).

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

667596 is a wasteful number, since it uses less digits than its factorization.

667596 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55640 (or 55638 counting only the distinct ones).

The product of its digits is 68040, while the sum is 39.

The square root of 667596 is about 817.0654808521. The cubic root of 667596 is about 87.3986199986.

The spelling of 667596 in words is "six hundred sixty-seven thousand, five hundred ninety-six".