668632 has 8 divisors (see below), whose sum is σ = 1253700. Its totient is φ = 334312.

The previous prime is 668623. The next prime is 668671. The reversal of 668632 is 236866.

668632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 668594 and 668603.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41782 + ... + 41797.

2⁶⁶⁸⁶³² is an apocalyptic number.

It is an amenable number.

668632 is a deficient number, since it is larger than the sum of its proper divisors (585068).

668632 is a wasteful number, since it uses less digits than its factorization.

668632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83585 (or 83581 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 668632 is about 817.6992112018. The cubic root of 668632 is about 87.4438060960.

The spelling of 668632 in words is "six hundred sixty-eight thousand, six hundred thirty-two".