72310655720666 has 16 divisors (see below), whose sum is σ = 118329474706560. Its totient is φ = 32867661216480.

The previous prime is 72310655720659. The next prime is 72310655720683. The reversal of 72310655720666 is 66602755601327.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40029026 + ... + 41796461.

It is an arithmetic number, because the mean of its divisors is an integer number (7395592169160).

Almost surely, 2^{72310655720666} is an apocalyptic number.

72310655720666 is a deficient number, since it is larger than the sum of its proper divisors (46018818985894).

72310655720666 is a wasteful number, since it uses less digits than its factorization.

72310655720666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81865669.

The product of its (nonzero) digits is 19051200, while the sum is 56.

The spelling of 72310655720666 in words is "seventy-two trillion, three hundred ten billion, six hundred fifty-five million, seven hundred twenty thousand, six hundred sixty-six".