66055566384576 has 224 divisors, whose sum is σ = 198732767481600. Its totient is φ = 21503696901120.

The previous prime is 66055566384569. The next prime is 66055566384581. The reversal of 66055566384576 is 67548366555066.

66055566384576 is a `hidden beast` number, since 6 + 6 + 0 + 5 + 5 + 566 + 3 + 8 + 4 + 57 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 623283271 + ... + 623389241.

Almost surely, 2^{66055566384576} 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 66055566384576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99366383740800).

66055566384576 is an abundant number, since it is smaller than the sum of its proper divisors (132677201097024).

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

66055566384576 is a wasteful number, since it uses less digits than its factorization.

66055566384576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114424 (or 114408 counting only the distinct ones).

The product of its (nonzero) digits is 3265920000, while the sum is 72.

The spelling of 66055566384576 in words is "sixty-six trillion, fifty-five billion, five hundred sixty-six million, three hundred eighty-four thousand, five hundred seventy-six".