64664000 has 112 divisors (see below), whose sum is σ = 164043360. Its totient is φ = 25241600.

The previous prime is 64663993. The next prime is 64664003. The reversal of 64664000 is 46646.

64664000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471932 + ... + 472068.

Almost surely, 2^64664000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64664000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82021680).

64664000 is an abundant number, since it is smaller than the sum of its proper divisors (99379360).

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

64664000 is a wasteful number, since it uses less digits than its factorization.

64664000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 64664000 is about 8041.3929141661. The cubic root of 64664000 is about 401.3785766909.

It can be divided in two parts, 646 and 64000, that added together give a palindrome (64646).

The spelling of 64664000 in words is "sixty-four million, six hundred sixty-four thousand".