66089385216 has 180 divisors, whose sum is σ = 197417973984. Its totient is φ = 21990528000.

The previous prime is 66089385211. The next prime is 66089385239. The reversal of 66089385216 is 61258398066.

It is a happy number.

66089385216 is a `hidden beast` number, since 6 + 6 + 0 + 89 + 38 + 521 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66089385211) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 13081891 + ... + 13086941.

Almost surely, 2^66089385216 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 66089385216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98708986992).

66089385216 is an abundant number, since it is smaller than the sum of its proper divisors (131328588768).

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

66089385216 is an equidigital number, since it uses as much as digits as its factorization.

66089385216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5710 (or 5687 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 66089385216 in words is "sixty-six billion, eighty-nine million, three hundred eighty-five thousand, two hundred sixteen".