64660752 has 90 divisors (see below), whose sum is σ = 196024842. Its totient is φ = 19888128.

The previous prime is 64660721. The next prime is 64660753. The reversal of 64660752 is 25706646.

64660752 is a `hidden beast` number, since 6 + 46 + 607 + 5 + 2 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 404496 + 64256256 = 636^2 + 8016^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (64660753) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23008 + ... + 25664.

Almost surely, 2^64660752 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 64660752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98012421).

64660752 is an abundant number, since it is smaller than the sum of its proper divisors (131364090).

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

64660752 is a wasteful number, since it uses less digits than its factorization.

64660752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2697 (or 2675 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The square root of 64660752 is about 8041.1909565686. The cubic root of 64660752 is about 401.3718563135.

The spelling of 64660752 in words is "sixty-four million, six hundred sixty thousand, seven hundred fifty-two".