664445995 has 8 divisors (see below), whose sum is σ = 797481216. Its totient is φ = 531459456.

The previous prime is 664445983. The next prime is 664446043. The reversal of 664445995 is 599544466.

664445995 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 664445995 - 2¹¹ = 664443947 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33334 + ... + 49396.

It is an arithmetic number, because the mean of its divisors is an integer number (99685152).

Almost surely, 2^664445995 is an apocalyptic number.

664445995 is a deficient number, since it is larger than the sum of its proper divisors (133035221).

664445995 is a wasteful number, since it uses less digits than its factorization.

664445995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24341.

The product of its digits is 4665600, while the sum is 52.

The square root of 664445995 is about 25776.8499821060. The cubic root of 664445995 is about 872.6094180556.

The spelling of 664445995 in words is "six hundred sixty-four million, four hundred forty-five thousand, nine hundred ninety-five".