72660931980 has 288 divisors, whose sum is σ = 254783391744. Its totient is φ = 15066874368.

The previous prime is 72660931957. The next prime is 72660931999. The reversal of 72660931980 is 8913906627.

It is a super-2 number, since 2×72660931980² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 19004349 + ... + 19008171.

Almost surely, 2^72660931980 is an apocalyptic number.

72660931980 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72660931980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127391695872).

72660931980 is an abundant number, since it is smaller than the sum of its proper divisors (182122459764).

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

72660931980 is a wasteful number, since it uses less digits than its factorization.

72660931980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3973 (or 3912 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 51.

The spelling of 72660931980 in words is "seventy-two billion, six hundred sixty million, nine hundred thirty-one thousand, nine hundred eighty".