72501161660 has 48 divisors (see below), whose sum is σ = 158948407296. Its totient is φ = 27726253632.

The previous prime is 72501161659. The next prime is 72501161669. The reversal of 72501161660 is 6616110527.

It is a self number, because there is not a number n which added to its sum of digits gives 72501161660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72501161669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 949007 + ... + 1022553.

It is an arithmetic number, because the mean of its divisors is an integer number (3311425152).

Almost surely, 2^72501161660 is an apocalyptic number.

It is an amenable number.

72501161660 is an abundant number, since it is smaller than the sum of its proper divisors (86447245636).

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

72501161660 is a wasteful number, since it uses less digits than its factorization.

72501161660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75722 (or 75720 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 72501161660 in words is "seventy-two billion, five hundred one million, one hundred sixty-one thousand, six hundred sixty".