66710866418352 has 240 divisors, whose sum is σ = 201651998355808. Its totient is φ = 20465924382720.

The previous prime is 66710866418327. The next prime is 66710866418363. The reversal of 66710866418352 is 25381466801766.

66710866418352 is a `hidden beast` number, since 6 + 6 + 7 + 108 + 66 + 418 + 3 + 52 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 66710866418352.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3184735143 + ... + 3184756089.

Almost surely, 2^{66710866418352} 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 66710866418352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100825999177904).

66710866418352 is an abundant number, since it is smaller than the sum of its proper divisors (134941131937456).

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

66710866418352 is a wasteful number, since it uses less digits than its factorization.

66710866418352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25908 (or 25899 counting only the distinct ones).

The product of its (nonzero) digits is 69672960, while the sum is 63.

The spelling of 66710866418352 in words is "sixty-six trillion, seven hundred ten billion, eight hundred sixty-six million, four hundred eighteen thousand, three hundred fifty-two".