660528 has 80 divisors (see below), whose sum is σ = 2083200. Its totient is φ = 198720.

The previous prime is 660521. The next prime is 660529. The reversal of 660528 is 825066.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660521) by changing a digit.

660528 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4683 + ... + 4821.

It is an arithmetic number, because the mean of its divisors is an integer number (26040).

2⁶⁶⁰⁵²⁸ 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 660528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1041600).

660528 is an abundant number, since it is smaller than the sum of its proper divisors (1422672).

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

660528 is a wasteful number, since it uses less digits than its factorization.

660528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 660528 is about 812.7287370335. The cubic root of 660528 is about 87.0890882903.

The spelling of 660528 in words is "six hundred sixty thousand, five hundred twenty-eight".