66373063280 has 320 divisors, whose sum is σ = 185709542400. Its totient is φ = 21856665600.

The previous prime is 66373063279. The next prime is 66373063301. The reversal of 66373063280 is 8236037366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17233355 + ... + 17237205.

It is an arithmetic number, because the mean of its divisors is an integer number (580342320).

Almost surely, 2^66373063280 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 66373063280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92854771200).

66373063280 is an abundant number, since it is smaller than the sum of its proper divisors (119336479120).

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

66373063280 is a wasteful number, since it uses less digits than its factorization.

66373063280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3952 (or 3946 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 44.

The spelling of 66373063280 in words is "sixty-six billion, three hundred seventy-three million, sixty-three thousand, two hundred eighty".