664803 has 6 divisors (see below), whose sum is σ = 960284. Its totient is φ = 443196.

The previous prime is 664799. The next prime is 664843. The reversal of 664803 is 308466.

It is not a de Polignac number, because 664803 - 2² = 664799 is a prime.

It is a Duffinian number.

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 5 ways as a sum of consecutive naturals, for example, 36925 + ... + 36942.

2⁶⁶⁴⁸⁰³ is an apocalyptic number.

664803 is a deficient number, since it is larger than the sum of its proper divisors (295481).

664803 is a wasteful number, since it uses less digits than its factorization.

664803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73873 (or 73870 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 664803 is about 815.3545241182. The cubic root of 664803 is about 87.2765673618.

The spelling of 664803 in words is "six hundred sixty-four thousand, eight hundred three".