72663517664266 has 8 divisors (see below), whose sum is σ = 108995335637220. Its totient is φ = 36331739118528.

The previous prime is 72663517664209. The next prime is 72663517664299. The reversal of 72663517664266 is 66246671536627.

It can be written as a sum of positive squares in 2 ways, for example, as 56733720488041 + 15929797176225 = 7532179^2 + 3991215^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4712361 + ... + 12943468.

Almost surely, 2^{72663517664266} is an apocalyptic number.

72663517664266 is a deficient number, since it is larger than the sum of its proper divisors (36331817972954).

72663517664266 is a wasteful number, since it uses less digits than its factorization.

72663517664266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19713608.

The product of its digits is 548674560, while the sum is 67.

The spelling of 72663517664266 in words is "seventy-two trillion, six hundred sixty-three billion, five hundred seventeen million, six hundred sixty-four thousand, two hundred sixty-six".