660525 has 12 divisors (see below), whose sum is σ = 1092192. Its totient is φ = 352240.

The previous prime is 660521. The next prime is 660529. The reversal of 660525 is 525066.

It is an interprime number because it is at equal distance from previous prime (660521) and next prime (660529).

It is not a de Polignac number, because 660525 - 2² = 660521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 660495 and 660504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660521) 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, 4329 + ... + 4478.

It is an arithmetic number, because the mean of its divisors is an integer number (91016).

2⁶⁶⁰⁵²⁵ is an apocalyptic number.

It is an amenable number.

660525 is a deficient number, since it is larger than the sum of its proper divisors (431667).

660525 is a wasteful number, since it uses less digits than its factorization.

660525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8820 (or 8815 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 660525 is about 812.7268913971. The cubic root of 660525 is about 87.0889564424.

The spelling of 660525 in words is "six hundred sixty thousand, five hundred twenty-five".