72124362666 has 12 divisors (see below), whose sum is σ = 156269452482. Its totient is φ = 24041454216.

The previous prime is 72124362647. The next prime is 72124362671. The reversal of 72124362666 is 66626342127.

It can be written as a sum of positive squares in only one way, i.e., 38901645225 + 33222717441 = 197235^2 + 182271^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2003454501 + ... + 2003454536.

Almost surely, 2^72124362666 is an apocalyptic number.

72124362666 is an abundant number, since it is smaller than the sum of its proper divisors (84145089816).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72124362666 is a wasteful number, since it uses less digits than its factorization.

72124362666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4006909045 (or 4006909042 counting only the distinct ones).

The product of its digits is 870912, while the sum is 45.

The spelling of 72124362666 in words is "seventy-two billion, one hundred twenty-four million, three hundred sixty-two thousand, six hundred sixty-six".