665933 has 4 divisors (see below), whose sum is σ = 677280. Its totient is φ = 654588.

The previous prime is 665923. The next prime is 665947. The reversal of 665933 is 339566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 339566 = 2 ⋅169783.

It is a cyclic number.

It is not a de Polignac number, because 665933 - 2⁸ = 665677 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 665933.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 665933.

It is not an unprimeable number, because it can be changed into a prime (665923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5585 + ... + 5702.

It is an arithmetic number, because the mean of its divisors is an integer number (169320).

2⁶⁶⁵⁹³³ is an apocalyptic number.

It is an amenable number.

665933 is a deficient number, since it is larger than the sum of its proper divisors (11347).

665933 is a wasteful number, since it uses less digits than its factorization.

665933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11346.

The product of its digits is 14580, while the sum is 32.

The square root of 665933 is about 816.0471800086. The cubic root of 665933 is about 87.3259888676.

The spelling of 665933 in words is "six hundred sixty-five thousand, nine hundred thirty-three".