667598 has 12 divisors (see below), whose sum is σ = 1048488. Its totient is φ = 318780.

The previous prime is 667577. The next prime is 667631. The reversal of 667598 is 895766.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 743 + ... + 1373.

It is an arithmetic number, because the mean of its divisors is an integer number (87374).

2⁶⁶⁷⁵⁹⁸ is an apocalyptic number.

667598 is a deficient number, since it is larger than the sum of its proper divisors (380890).

667598 is a wasteful number, since it uses less digits than its factorization.

667598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679 (or 656 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 667598 is about 817.0667047433. The cubic root of 667598 is about 87.3987072754.

The spelling of 667598 in words is "six hundred sixty-seven thousand, five hundred ninety-eight".