665075 has 12 divisors (see below), whose sum is σ = 848160. Its totient is φ = 516960.

The previous prime is 665069. The next prime is 665089. The reversal of 665075 is 570566.

It is not a de Polignac number, because 665075 - 2⁶ = 665011 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 566 + ... + 1284.

It is an arithmetic number, because the mean of its divisors is an integer number (70680).

2⁶⁶⁵⁰⁷⁵ is an apocalyptic number.

665075 is a deficient number, since it is larger than the sum of its proper divisors (183085).

665075 is a wasteful number, since it uses less digits than its factorization.

665075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766 (or 761 counting only the distinct ones).

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

The square root of 665075 is about 815.5213056690. The cubic root of 665075 is about 87.2884686265.

The spelling of 665075 in words is "six hundred sixty-five thousand, seventy-five".