64664005 has 32 divisors (see below), whose sum is σ = 94556160. Its totient is φ = 41441280.

The previous prime is 64664003. The next prime is 64664021. The reversal of 64664005 is 50046646.

It is not a de Polignac number, because 64664005 - 2¹ = 64664003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64664003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113361 + ... + 113929.

It is an arithmetic number, because the mean of its divisors is an integer number (2954880).

Almost surely, 2^64664005 is an apocalyptic number.

It is an amenable number.

64664005 is a deficient number, since it is larger than the sum of its proper divisors (29892155).

64664005 is a wasteful number, since it uses less digits than its factorization.

64664005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 64664005 is about 8041.3932250575. The cubic root of 64664005 is about 401.3785870361.

The spelling of 64664005 in words is "sixty-four million, six hundred sixty-four thousand, five".