635668 has 12 divisors (see below), whose sum is σ = 1213632. Its totient is φ = 288920.

The previous prime is 635659. The next prime is 635689. The reversal of 635668 is 866536.

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, 7180 + ... + 7267.

It is an arithmetic number, because the mean of its divisors is an integer number (101136).

2⁶³⁵⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

635668 is a deficient number, since it is larger than the sum of its proper divisors (577964).

635668 is a wasteful number, since it uses less digits than its factorization.

635668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14462 (or 14460 counting only the distinct ones).

The product of its digits is 25920, while the sum is 34.

The square root of 635668 is about 797.2879028306. The cubic root of 635668 is about 85.9825095132.

The spelling of 635668 in words is "six hundred thirty-five thousand, six hundred sixty-eight".