666275 has 12 divisors (see below), whose sum is σ = 855600. Its totient is φ = 514080.

The previous prime is 666269. The next prime is 666277. The reversal of 666275 is 572666.

It is not a de Polignac number, because 666275 - 2⁸ = 666019 is a prime.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (666277) 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, 266 + ... + 1184.

It is an arithmetic number, because the mean of its divisors is an integer number (71300).

2⁶⁶⁶²⁷⁵ is an apocalyptic number.

666275 is a deficient number, since it is larger than the sum of its proper divisors (189325).

666275 is a wasteful number, since it uses less digits than its factorization.

666275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958 (or 953 counting only the distinct ones).

The product of its digits is 15120, while the sum is 32.

The square root of 666275 is about 816.2566998194. The cubic root of 666275 is about 87.3409355049.

The spelling of 666275 in words is "six hundred sixty-six thousand, two hundred seventy-five".