666285 has 16 divisors (see below), whose sum is σ = 1091904. Its totient is φ = 346752.

The previous prime is 666277. The next prime is 666301. The reversal of 666285 is 582666.

666285 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 666285 - 2³ = 666277 is a prime.

It is a Curzon number.

It is a congruent 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, 129 + ... + 1161.

It is an arithmetic number, because the mean of its divisors is an integer number (68244).

2⁶⁶⁶²⁸⁵ is an apocalyptic number.

It is an amenable number.

666285 is a deficient number, since it is larger than the sum of its proper divisors (425619).

666285 is a wasteful number, since it uses less digits than its factorization.

666285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084.

The product of its digits is 17280, while the sum is 33.

The square root of 666285 is about 816.2628253204. The cubic root of 666285 is about 87.3413724641.

The spelling of 666285 in words is "six hundred sixty-six thousand, two hundred eighty-five".