668733 has 12 divisors (see below), whose sum is σ = 966240. Its totient is φ = 411216.

The previous prime is 668719. The next prime is 668737. The reversal of 668733 is 337866.

It is a happy number.

668733 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 668733 - 2⁹ = 668221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 668694 and 668703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668737) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 153 + ... + 1166.

It is an arithmetic number, because the mean of its divisors is an integer number (80520).

2⁶⁶⁸⁷³³ is an apocalyptic number.

It is an amenable number.

668733 is a deficient number, since it is larger than the sum of its proper divisors (297507).

668733 is a wasteful number, since it uses less digits than its factorization.

668733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1348 (or 1335 counting only the distinct ones).

The product of its digits is 18144, while the sum is 33.

The square root of 668733 is about 817.7609675205. The cubic root of 668733 is about 87.4482088067.

The spelling of 668733 in words is "six hundred sixty-eight thousand, seven hundred thirty-three".