660682660 has 48 divisors (see below), whose sum is σ = 1517709312. Its totient is φ = 239590400.

The previous prime is 660682639. The next prime is 660682667. The reversal of 660682660 is 66286066.

660682660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (660682667) 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, 80340 + ... + 88180.

It is an arithmetic number, because the mean of its divisors is an integer number (31618944).

Almost surely, 2^660682660 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 660682660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (758854656).

660682660 is an abundant number, since it is smaller than the sum of its proper divisors (857026652).

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

660682660 is a wasteful number, since it uses less digits than its factorization.

660682660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8244 (or 8242 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 660682660 is about 25703.7479757330. The cubic root of 660682660 is about 870.9588494757.

The spelling of 660682660 in words is "six hundred sixty million, six hundred eighty-two thousand, six hundred sixty".