72716771266 has 8 divisors (see below), whose sum is σ = 109184563260. Its totient is φ = 36321916848.

The previous prime is 72716771233. The next prime is 72716771297. The reversal of 72716771266 is 66217761727.

It can be written as a sum of positive squares in 2 ways, for example, as 69915292225 + 2801479041 = 264415^2 + 52929^2 .

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 18231901 + ... + 18235888.

Almost surely, 2^72716771266 is an apocalyptic number.

72716771266 is a deficient number, since it is larger than the sum of its proper divisors (36467791994).

72716771266 is a wasteful number, since it uses less digits than its factorization.

72716771266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36468788.

The product of its digits is 2074464, while the sum is 52.

The spelling of 72716771266 in words is "seventy-two billion, seven hundred sixteen million, seven hundred seventy-one thousand, two hundred sixty-six".