664683 has 8 divisors (see below), whose sum is σ = 938448. Its totient is φ = 417024.

The previous prime is 664679. The next prime is 664687. The reversal of 664683 is 386466.

It is an interprime number because it is at equal distance from previous prime (664679) and next prime (664687).

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

It is not a de Polignac number, because 664683 - 2² = 664679 is a prime.

664683 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 664683.

It is not an unprimeable number, because it can be changed into a prime (664687) 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, 6466 + ... + 6567.

It is an arithmetic number, because the mean of its divisors is an integer number (117306).

2⁶⁶⁴⁶⁸³ is an apocalyptic number.

664683 is a deficient number, since it is larger than the sum of its proper divisors (273765).

664683 is a wasteful number, since it uses less digits than its factorization.

664683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13053.

The product of its digits is 20736, while the sum is 33.

The square root of 664683 is about 815.2809331758. The cubic root of 664683 is about 87.2713157718.

The spelling of 664683 in words is "six hundred sixty-four thousand, six hundred eighty-three".