66729716593 has 16 divisors (see below), whose sum is σ = 72610393600. Its totient is φ = 61091677440.

The previous prime is 66729716579. The next prime is 66729716597. The reversal of 66729716593 is 39561792766.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66729716593 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 337705 + ... + 497497.

It is an arithmetic number, because the mean of its divisors is an integer number (4538149600).

Almost surely, 2^66729716593 is an apocalyptic number.

It is an amenable number.

66729716593 is a deficient number, since it is larger than the sum of its proper divisors (5880677007).

66729716593 is a wasteful number, since it uses less digits than its factorization.

66729716593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160552.

The product of its digits is 25719120, while the sum is 61.

The spelling of 66729716593 in words is "sixty-six billion, seven hundred twenty-nine million, seven hundred sixteen thousand, five hundred ninety-three".