660116560 has 160 divisors (see below), whose sum is σ = 1687392000. Its totient is φ = 239382528.

The previous prime is 660116539. The next prime is 660116591. The reversal of 660116560 is 65611066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4748971 + ... + 4749109.

It is an arithmetic number, because the mean of its divisors is an integer number (10546200).

Almost surely, 2^660116560 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 660116560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (843696000).

660116560 is an abundant number, since it is smaller than the sum of its proper divisors (1027275440).

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

660116560 is a wasteful number, since it uses less digits than its factorization.

660116560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 660116560 is about 25692.7336031026. The cubic root of 660116560 is about 870.7100206388.

The spelling of 660116560 in words is "six hundred sixty million, one hundred sixteen thousand, five hundred sixty".