66113997599 has 8 divisors (see below), whose sum is σ = 71442696192. Its totient is φ = 60820014240.

The previous prime is 66113997581. The next prime is 66113997617. The reversal of 66113997599 is 99579931166.

It is an interprime number because it is at equal distance from previous prime (66113997581) and next prime (66113997617).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66113997599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66113997529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8674847 + ... + 8682464.

It is an arithmetic number, because the mean of its divisors is an integer number (8930337024).

Almost surely, 2^66113997599 is an apocalyptic number.

66113997599 is a deficient number, since it is larger than the sum of its proper divisors (5328698593).

66113997599 is a wasteful number, since it uses less digits than its factorization.

66113997599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17357617.

The product of its digits is 24800580, while the sum is 65.

The spelling of 66113997599 in words is "sixty-six billion, one hundred thirteen million, nine hundred ninety-seven thousand, five hundred ninety-nine".