660881389376 has 112 divisors (see below), whose sum is σ = 1458733785600. Its totient is φ = 295008860160.

The previous prime is 660881389351. The next prime is 660881389403. The reversal of 660881389376 is 673983188066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50262035 + ... + 50275181.

It is an arithmetic number, because the mean of its divisors is an integer number (13024408800).

Almost surely, 2^660881389376 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 660881389376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (729366892800).

660881389376 is an abundant number, since it is smaller than the sum of its proper divisors (797852396224).

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

660881389376 is a wasteful number, since it uses less digits than its factorization.

660881389376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15152 (or 15142 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 65.

The spelling of 660881389376 in words is "six hundred sixty billion, eight hundred eighty-one million, three hundred eighty-nine thousand, three hundred seventy-six".