660975 has 24 divisors (see below), whose sum is σ = 1249920. Its totient is φ = 301920.

The previous prime is 660973. The next prime is 660983. The reversal of 660975 is 579066.

It is not a de Polignac number, because 660975 - 2¹ = 660973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105 + ... + 1154.

It is an arithmetic number, because the mean of its divisors is an integer number (52080).

2⁶⁶⁰⁹⁷⁵ is an apocalyptic number.

660975 is a deficient number, since it is larger than the sum of its proper divisors (588945).

660975 is a wasteful number, since it uses less digits than its factorization.

660975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279 (or 1274 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 660975 is about 813.0036900285. The cubic root of 660975 is about 87.1087291656.

The spelling of 660975 in words is "six hundred sixty thousand, nine hundred seventy-five".