665683 has 8 divisors (see below), whose sum is σ = 692208. Its totient is φ = 639744.

The previous prime is 665677. The next prime is 665713. The reversal of 665683 is 386566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 665683 - 2¹³ = 657491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4791 + ... + 4927.

It is an arithmetic number, because the mean of its divisors is an integer number (86526).

2⁶⁶⁵⁶⁸³ is an apocalyptic number.

665683 is a deficient number, since it is larger than the sum of its proper divisors (26525).

665683 is a wasteful number, since it uses less digits than its factorization.

665683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293.

The product of its digits is 25920, while the sum is 34.

The square root of 665683 is about 815.8939882117. The cubic root of 665683 is about 87.3150597252.

The spelling of 665683 in words is "six hundred sixty-five thousand, six hundred eighty-three".