664333 has 4 divisors (see below), whose sum is σ = 665980. Its totient is φ = 662688.

The previous prime is 664331. The next prime is 664357. The reversal of 664333 is 333466.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 59049 + 605284 = 243^2 + 778^2 .

It is a cyclic number.

It is not a de Polignac number, because 664333 - 2¹ = 664331 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 664298 and 664307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664331) 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, 241 + ... + 1177.

It is an arithmetic number, because the mean of its divisors is an integer number (166495).

2⁶⁶⁴³³³ is an apocalyptic number.

It is an amenable number.

664333 is a deficient number, since it is larger than the sum of its proper divisors (1647).

664333 is an equidigital number, since it uses as much as digits as its factorization.

664333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646.

The product of its digits is 3888, while the sum is 25.

The square root of 664333 is about 815.0662549756. The cubic root of 664333 is about 87.2559950232.

Adding to 664333 its reverse (333466), we get a palindrome (997799).

The spelling of 664333 in words is "six hundred sixty-four thousand, three hundred thirty-three".