664833 has 8 divisors (see below), whose sum is σ = 954688. Its totient is φ = 409104.

The previous prime is 664799. The next prime is 664843. The reversal of 664833 is 338466.

664833 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 664833 - 2¹⁴ = 648449 is a prime.

It is a Duffinian number.

664833 is strictly pandigital in base 7.

It is a self number, because there is not a number n which added to its sum of digits gives 664833.

It is not an unprimeable number, because it can be changed into a prime (664843) 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, 8485 + ... + 8562.

It is an arithmetic number, because the mean of its divisors is an integer number (119336).

2⁶⁶⁴⁸³³ is an apocalyptic number.

It is an amenable number.

664833 is a deficient number, since it is larger than the sum of its proper divisors (289855).

664833 is a wasteful number, since it uses less digits than its factorization.

664833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17063.

The product of its digits is 10368, while the sum is 30.

The square root of 664833 is about 815.3729208160. The cubic root of 664833 is about 87.2778801606.

The spelling of 664833 in words is "six hundred sixty-four thousand, eight hundred thirty-three".