72666788566 has 8 divisors (see below), whose sum is σ = 109029645504. Its totient is φ = 36323573400.

The previous prime is 72666788531. The next prime is 72666788567. The reversal of 72666788566 is 66588766627.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72666788567) by changing a digit.

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, 4901190 + ... + 4915993.

It is an arithmetic number, because the mean of its divisors is an integer number (13628705688).

Almost surely, 2^72666788566 is an apocalyptic number.

72666788566 is a deficient number, since it is larger than the sum of its proper divisors (36362856938).

72666788566 is a wasteful number, since it uses less digits than its factorization.

72666788566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9820886.

The product of its digits is 243855360, while the sum is 67.

The spelling of 72666788566 in words is "seventy-two billion, six hundred sixty-six million, seven hundred eighty-eight thousand, five hundred sixty-six".