668233 has 6 divisors (see below), whose sum is σ = 683354. Its totient is φ = 653376.

The previous prime is 668221. The next prime is 668243. The reversal of 668233 is 332866.

It can be written as a sum of positive squares in only one way, i.e., 558009 + 110224 = 747^2 + 332^2 .

It is not a de Polignac number, because 668233 - 2⁵ = 668201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (668203) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6841 + ... + 6937.

2⁶⁶⁸²³³ is an apocalyptic number.

It is an amenable number.

668233 is a deficient number, since it is larger than the sum of its proper divisors (15121).

668233 is an frugal number, since it uses more digits than its factorization.

668233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 180 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 668233 is about 817.4551975491. The cubic root of 668233 is about 87.4264088725.

The spelling of 668233 in words is "six hundred sixty-eight thousand, two hundred thirty-three".