72666237852 has 72 divisors (see below), whose sum is σ = 198322662720. Its totient is φ = 22301308800.

The previous prime is 72666237841. The next prime is 72666237857. The reversal of 72666237852 is 25873266627.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72666237857) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17524 + ... + 381627.

Almost surely, 2^72666237852 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72666237852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99161331360).

72666237852 is an abundant number, since it is smaller than the sum of its proper divisors (125656424868).

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

72666237852 is a wasteful number, since it uses less digits than its factorization.

72666237852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399563 (or 399558 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 54.

The spelling of 72666237852 in words is "seventy-two billion, six hundred sixty-six million, two hundred thirty-seven thousand, eight hundred fifty-two".