660265 has 16 divisors (see below), whose sum is σ = 842688. Its totient is φ = 495936.

The previous prime is 660251. The next prime is 660271. The reversal of 660265 is 562066.

It is a cyclic number.

It is not a de Polignac number, because 660265 - 2⁷ = 660137 is a prime.

It is a Duffinian number.

660265 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7914 + ... + 7996.

It is an arithmetic number, because the mean of its divisors is an integer number (52668).

2⁶⁶⁰²⁶⁵ is an apocalyptic number.

It is an amenable number.

660265 is a deficient number, since it is larger than the sum of its proper divisors (182423).

660265 is a wasteful number, since it uses less digits than its factorization.

660265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 660265 is about 812.5669203210. The cubic root of 660265 is about 87.0775281088.

The spelling of 660265 in words is "six hundred sixty thousand, two hundred sixty-five".