72566022722 has 18 divisors (see below), whose sum is σ = 110536774803. Its totient is φ = 35728902132.

The previous prime is 72566022703. The next prime is 72566022761. The reversal of 72566022722 is 22722066527.

It can be written as a sum of positive squares in only one way, i.e., 36283011361 + 36283011361 = 190481^2 + 190481^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=190481.

It is a super-3 number, since 3×72566022722³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72566022722.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 25523033 + ... + 25525875.

Almost surely, 2^72566022722 is an apocalyptic number.

72566022722 is a deficient number, since it is larger than the sum of its proper divisors (37970752081).

72566022722 is an frugal number, since it uses more digits than its factorization.

72566022722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5822 (or 2912 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 41.

The spelling of 72566022722 in words is "seventy-two billion, five hundred sixty-six million, twenty-two thousand, seven hundred twenty-two".