668528 has 40 divisors (see below), whose sum is σ = 1523712. Its totient is φ = 278208.

The previous prime is 668527. The next prime is 668531. The reversal of 668528 is 825866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668527) 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, 5201 + ... + 5327.

2⁶⁶⁸⁵²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 668528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (761856).

668528 is an abundant number, since it is smaller than the sum of its proper divisors (855184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668528 is a wasteful number, since it uses less digits than its factorization.

668528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 183 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 668528 is about 817.6356156626. The cubic root of 668528 is about 87.4392721484.

The spelling of 668528 in words is "six hundred sixty-eight thousand, five hundred twenty-eight".