66729716592 has 80 divisors (see below), whose sum is σ = 214921696512. Its totient is φ = 17332392960.

The previous prime is 66729716579. The next prime is 66729716597. The reversal of 66729716592 is 29561792766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66729716597) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9023593 + ... + 9030984.

Almost surely, 2^66729716592 is an apocalyptic number.

It is an amenable number.

66729716592 is an abundant number, since it is smaller than the sum of its proper divisors (148191979920).

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

66729716592 is a wasteful number, since it uses less digits than its factorization.

66729716592 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18054606 (or 18054600 counting only the distinct ones).

The product of its digits is 17146080, while the sum is 60.

The spelling of 66729716592 in words is "sixty-six billion, seven hundred twenty-nine million, seven hundred sixteen thousand, five hundred ninety-two".