66692746008720 has 480 divisors, whose sum is σ = 242326590105600. Its totient is φ = 16340433371136.

The previous prime is 66692746008709. The next prime is 66692746008767. The reversal of 66692746008720 is 2780064729666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6015395017 + ... + 6015406103.

It is an arithmetic number, because the mean of its divisors is an integer number (504847062720).

Almost surely, 2^{66692746008720} is an apocalyptic number.

66692746008720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66692746008720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121163295052800).

66692746008720 is an abundant number, since it is smaller than the sum of its proper divisors (175633844096880).

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

66692746008720 is a wasteful number, since it uses less digits than its factorization.

66692746008720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14047 (or 14038 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 63.

The spelling of 66692746008720 in words is "sixty-six trillion, six hundred ninety-two billion, seven hundred forty-six million, eight thousand, seven hundred twenty".