664445635 has 48 divisors (see below), whose sum is σ = 952390656. Its totient is φ = 443584512.

The previous prime is 664445623. The next prime is 664445641. The reversal of 664445635 is 536544466.

664445635 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664445635 - 2⁵ = 664445603 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664445591 and 664445600.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1734654 + ... + 1735036.

It is an arithmetic number, because the mean of its divisors is an integer number (19841472).

Almost surely, 2^664445635 is an apocalyptic number.

664445635 is a deficient number, since it is larger than the sum of its proper divisors (287945021).

664445635 is a wasteful number, since it uses less digits than its factorization.

664445635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 565 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 43.

The square root of 664445635 is about 25776.8429990951. The cubic root of 664445635 is about 872.6092604610.

The spelling of 664445635 in words is "six hundred sixty-four million, four hundred forty-five thousand, six hundred thirty-five".