666872968160 has 96 divisors (see below), whose sum is σ = 1801864999872. Its totient is φ = 228476067840.

The previous prime is 666872968159. The next prime is 666872968189. The reversal of 666872968160 is 61869278666.

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, 1331144 + ... + 1762296.

It is an arithmetic number, because the mean of its divisors is an integer number (18769427082).

Almost surely, 2^666872968160 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 666872968160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (900932499936).

666872968160 is an abundant number, since it is smaller than the sum of its proper divisors (1134992031712).

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

666872968160 is a wasteful number, since it uses less digits than its factorization.

666872968160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432556 (or 432548 counting only the distinct ones).

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

The spelling of 666872968160 in words is "six hundred sixty-six billion, eight hundred seventy-two million, nine hundred sixty-eight thousand, one hundred sixty".