660520960 has 120 divisors (see below), whose sum is σ = 1731670416. Its totient is φ = 239861760.

The previous prime is 660520957. The next prime is 660520967. The reversal of 660520960 is 69025066.

It is not an unprimeable number, because it can be changed into a prime (660520967) 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 7 ways as a sum of consecutive naturals, for example, 900754 + ... + 901486.

Almost surely, 2^660520960 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 660520960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (865835208).

660520960 is an abundant number, since it is smaller than the sum of its proper divisors (1071149456).

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

660520960 is an equidigital number, since it uses as much as digits as its factorization.

660520960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777 (or 751 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 660520960 is about 25700.6023275720. The cubic root of 660520960 is about 870.8877888664.

The spelling of 660520960 in words is "six hundred sixty million, five hundred twenty thousand, nine hundred sixty".