665883 has 12 divisors (see below), whose sum is σ = 968968. Its totient is φ = 440640.

The previous prime is 665857. The next prime is 665897. The reversal of 665883 is 388566.

It is not a de Polignac number, because 665883 - 2¹⁴ = 649499 is a prime.

It is a Duffinian number.

665883 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (665803) 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, 2016 + ... + 2322.

2⁶⁶⁵⁸⁸³ is an apocalyptic number.

665883 is a deficient number, since it is larger than the sum of its proper divisors (303085).

665883 is a wasteful number, since it uses less digits than its factorization.

665883 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 551 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 665883 is about 816.0165439499. The cubic root of 665883 is about 87.3238032579.

The spelling of 665883 in words is "six hundred sixty-five thousand, eight hundred eighty-three".