65005664 has 24 divisors (see below), whose sum is σ = 131104008. Its totient is φ = 31709440.

The previous prime is 65005649. The next prime is 65005673. The reversal of 65005664 is 46650056.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 65005664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23462 + ... + 26085.

It is an arithmetic number, because the mean of its divisors is an integer number (5462667).

Almost surely, 2^65005664 is an apocalyptic number.

It is an amenable number.

65005664 is an abundant number, since it is smaller than the sum of its proper divisors (66098344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65005664 is a wasteful number, since it uses less digits than its factorization.

65005664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49598 (or 49590 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 65005664 is about 8062.6090070150. The cubic root of 65005664 is about 402.0842541816.

The spelling of 65005664 in words is "sixty-five million, five thousand, six hundred sixty-four".