660982139688 has 128 divisors (see below), whose sum is σ = 1794779683200. Its totient is φ = 201644522496.

The previous prime is 660982139683. The next prime is 660982139737. The reversal of 660982139688 is 886931289066.

It is not an unprimeable number, because it can be changed into a prime (660982139683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33513606 + ... + 33533322.

It is an arithmetic number, because the mean of its divisors is an integer number (14021716275).

Almost surely, 2^660982139688 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 660982139688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (897389841600).

660982139688 is an abundant number, since it is smaller than the sum of its proper divisors (1133797543512).

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

660982139688 is a wasteful number, since it uses less digits than its factorization.

660982139688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20651 (or 20647 counting only the distinct ones).

The product of its (nonzero) digits is 53747712, while the sum is 66.

The spelling of 660982139688 in words is "six hundred sixty billion, nine hundred eighty-two million, one hundred thirty-nine thousand, six hundred eighty-eight".