72166877044 has 12 divisors (see below), whose sum is σ = 126375627168. Its totient is φ = 36059555000.

The previous prime is 72166877039. The next prime is 72166877059. The reversal of 72166877044 is 44077866127.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 72166876982 and 72166877000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5964082 + ... + 5976169.

It is an arithmetic number, because the mean of its divisors is an integer number (10531302264).

Almost surely, 2^72166877044 is an apocalyptic number.

It is an amenable number.

72166877044 is a deficient number, since it is larger than the sum of its proper divisors (54208750124).

72166877044 is a wasteful number, since it uses less digits than its factorization.

72166877044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11941766 (or 11941764 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 52.

The spelling of 72166877044 in words is "seventy-two billion, one hundred sixty-six million, eight hundred seventy-seven thousand, forty-four".