660575 has 6 divisors (see below), whose sum is σ = 819144. Its totient is φ = 528440.

The previous prime is 660563. The next prime is 660589. The reversal of 660575 is 575066.

660575 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 660575 - 2⁴ = 660559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13187 + ... + 13236.

It is an arithmetic number, because the mean of its divisors is an integer number (136524).

2⁶⁶⁰⁵⁷⁵ is an apocalyptic number.

660575 is a deficient number, since it is larger than the sum of its proper divisors (158569).

660575 is a wasteful number, since it uses less digits than its factorization.

660575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26433 (or 26428 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 660575 is about 812.7576514558. The cubic root of 660575 is about 87.0911538551.

The spelling of 660575 in words is "six hundred sixty thousand, five hundred seventy-five".