664433 has 8 divisors (see below), whose sum is σ = 828480. Its totient is φ = 517680.

The previous prime is 664427. The next prime is 664441. The reversal of 664433 is 334466.

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 664433 - 2⁶ = 664369 is a prime.

It is a super-2 number, since 2×664433² = 882942422978, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 664433.

It is not an unprimeable number, because it can be changed into a prime (664403) 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, 4238 + ... + 4391.

It is an arithmetic number, because the mean of its divisors is an integer number (103560).

2⁶⁶⁴⁴³³ is an apocalyptic number.

It is an amenable number.

664433 is a deficient number, since it is larger than the sum of its proper divisors (164047).

664433 is a wasteful number, since it uses less digits than its factorization.

664433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8647.

The product of its digits is 5184, while the sum is 26.

The square root of 664433 is about 815.1275973736. The cubic root of 664433 is about 87.2603729290.

Adding to 664433 its reverse (334466), we get a palindrome (998899).

The spelling of 664433 in words is "six hundred sixty-four thousand, four hundred thirty-three".