64652720 has 60 divisors (see below), whose sum is σ = 165249840. Its totient is φ = 23506560.

The previous prime is 64652711. The next prime is 64652729. The reversal of 64652720 is 2725646.

64652720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (64652711) and next prime (64652729).

It is not an unprimeable number, because it can be changed into a prime (64652729) 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 11 ways as a sum of consecutive naturals, for example, 6341 + ... + 13019.

It is an arithmetic number, because the mean of its divisors is an integer number (2754164).

Almost surely, 2^64652720 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 64652720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82624920).

64652720 is an abundant number, since it is smaller than the sum of its proper divisors (100597120).

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

64652720 is a wasteful number, since it uses less digits than its factorization.

64652720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6714 (or 6697 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 64652720 is about 8040.6915125504. The cubic root of 64652720 is about 401.3552364829.

The spelling of 64652720 in words is "sixty-four million, six hundred fifty-two thousand, seven hundred twenty".