660760064 has 40 divisors (see below), whose sum is σ = 1327133808. Its totient is φ = 328652800.

The previous prime is 660760027. The next prime is 660760069. The reversal of 660760064 is 460067066.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660760069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97589 + ... + 104139.

Almost surely, 2^660760064 is an apocalyptic number.

660760064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 660760064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (663566904).

660760064 is an abundant number, since it is smaller than the sum of its proper divisors (666373744).

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

660760064 is an equidigital number, since it uses as much as digits as its factorization.

660760064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6766 (or 6750 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 660760064 is about 25705.2536264476. The cubic root of 660760064 is about 870.9928612993.

The spelling of 660760064 in words is "six hundred sixty million, seven hundred sixty thousand, sixty-four".