660365064 has 96 divisors (see below), whose sum is σ = 1891375200. Its totient is φ = 207567360.

The previous prime is 660365009. The next prime is 660365089. The reversal of 660365064 is 460563066.

660365064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 328687 + ... + 330689.

It is an arithmetic number, because the mean of its divisors is an integer number (19701825).

Almost surely, 2^660365064 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 660365064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (945687600).

660365064 is an abundant number, since it is smaller than the sum of its proper divisors (1231010136).

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

660365064 is a wasteful number, since it uses less digits than its factorization.

660365064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275 (or 2268 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The square root of 660365064 is about 25697.5692235667. The cubic root of 660365064 is about 870.8192678991.

The spelling of 660365064 in words is "six hundred sixty million, three hundred sixty-five thousand, sixty-four".