667597 has 8 divisors (see below), whose sum is σ = 767936. Its totient is φ = 568512.

The previous prime is 667577. The next prime is 667631. The reversal of 667597 is 795766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 667597 - 2¹¹ = 665549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1813 + ... + 2149.

It is an arithmetic number, because the mean of its divisors is an integer number (95992).

2⁶⁶⁷⁵⁹⁷ is an apocalyptic number.

It is an amenable number.

667597 is a deficient number, since it is larger than the sum of its proper divisors (100339).

667597 is a wasteful number, since it uses less digits than its factorization.

667597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627.

The product of its digits is 79380, while the sum is 40.

The square root of 667597 is about 817.0660927979. The cubic root of 667597 is about 87.3986636370.

It can be divided in two parts, 66759 and 7, that added together give a palindrome (66766).

The spelling of 667597 in words is "six hundred sixty-seven thousand, five hundred ninety-seven".