660504 has 64 divisors (see below), whose sum is σ = 1864800. Its totient is φ = 193536.

The previous prime is 660503. The next prime is 660509. The reversal of 660504 is 405066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9012 + ... + 9084.

2⁶⁶⁰⁵⁰⁴ 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 660504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (932400).

660504 is an abundant number, since it is smaller than the sum of its proper divisors (1204296).

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

660504 is a wasteful number, since it uses less digits than its factorization.

660504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 660504 is about 812.7139718253. The cubic root of 660504 is about 87.0880334960.

The spelling of 660504 in words is "six hundred sixty thousand, five hundred four".