664453331 has 4 divisors (see below), whose sum is σ = 664528200. Its totient is φ = 664378464.

The previous prime is 664453327. The next prime is 664453333. The reversal of 664453331 is 133354466.

664453331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 is a cyclic number.

It is not a de Polignac number, because 664453331 - 2² = 664453327 is a prime.

It is a super-2 number, since 2×664453331² = 882996458153991122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664453291 and 664453300.

It is not an unprimeable number, because it can be changed into a prime (664453333) 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, 22001 + ... + 42578.

It is an arithmetic number, because the mean of its divisors is an integer number (166132050).

Almost surely, 2^664453331 is an apocalyptic number.

664453331 is a deficient number, since it is larger than the sum of its proper divisors (74869).

664453331 is a wasteful number, since it uses less digits than its factorization.

664453331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74868.

The product of its digits is 77760, while the sum is 35.

The square root of 664453331 is about 25776.9922799383. The cubic root of 664453331 is about 872.6126294725.

The spelling of 664453331 in words is "six hundred sixty-four million, four hundred fifty-three thousand, three hundred thirty-one".