660520168 has 64 divisors (see below), whose sum is σ = 1581793920. Its totient is φ = 251059200.

The previous prime is 660520117. The next prime is 660520169. The reversal of 660520168 is 861025066.

It is not an unprimeable number, because it can be changed into a prime (660520169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12180 + ... + 38332.

It is an arithmetic number, because the mean of its divisors is an integer number (24715530).

Almost surely, 2^660520168 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 660520168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (790896960).

660520168 is an abundant number, since it is smaller than the sum of its proper divisors (921273752).

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

660520168 is a wasteful number, since it uses less digits than its factorization.

660520168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26218 (or 26214 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 660520168 is about 25700.5869193682. The cubic root of 660520168 is about 870.8874407859.

The spelling of 660520168 in words is "six hundred sixty million, five hundred twenty thousand, one hundred sixty-eight".