72166266116993 has 8 divisors (see below), whose sum is σ = 72296484633216. Its totient is φ = 72036097761600.

The previous prime is 72166266116951. The next prime is 72166266116999. The reversal of 72166266116993 is 39961166266127.

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

It is a cyclic number.

It is not a de Polignac number, because 72166266116993 - 2⁴⁶ = 1797521939329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72166266116999) 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, 9659621 + ... + 15415602.

It is an arithmetic number, because the mean of its divisors is an integer number (9037060579152).

Almost surely, 2^{72166266116993} is an apocalyptic number.

It is an amenable number.

72166266116993 is a deficient number, since it is larger than the sum of its proper divisors (130218516223).

72166266116993 is a wasteful number, since it uses less digits than its factorization.

72166266116993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25080415.

The product of its digits is 52907904, while the sum is 65.

The spelling of 72166266116993 in words is "seventy-two trillion, one hundred sixty-six billion, two hundred sixty-six million, one hundred sixteen thousand, nine hundred ninety-three".