66572385984 has 84 divisors (see below), whose sum is σ = 205496034016. Its totient is φ = 20483808768.

The previous prime is 66572385983. The next prime is 66572386003. The reversal of 66572385984 is 48958327566.

It is a happy number.

66572385984 is a `hidden beast` number, since 6 + 6 + 5 + 7 + 2 + 38 + 598 + 4 = 666.

It is a super-3 number, since 3×66572385984³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (66572385983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4437784 + ... + 4452759.

Almost surely, 2^66572385984 is an apocalyptic number.

66572385984 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

66572385984 is an abundant number, since it is smaller than the sum of its proper divisors (138923648032).

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

66572385984 is a wasteful number, since it uses less digits than its factorization.

66572385984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8890574 (or 8890561 counting only the distinct ones).

The product of its digits is 87091200, while the sum is 63.

The spelling of 66572385984 in words is "sixty-six billion, five hundred seventy-two million, three hundred eighty-five thousand, nine hundred eighty-four".