72080660 has 24 divisors (see below), whose sum is σ = 156590280. Its totient is φ = 27837824.

The previous prime is 72080633. The next prime is 72080681. The reversal of 72080660 is 6608027.

It can be written as a sum of positive squares in 4 ways, for example, as 3952144 + 68128516 = 1988^2 + 8254^2 .

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61559 + ... + 62718.

It is an arithmetic number, because the mean of its divisors is an integer number (6524595).

Almost surely, 2^72080660 is an apocalyptic number.

It is an amenable number.

72080660 is an abundant number, since it is smaller than the sum of its proper divisors (84509620).

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

72080660 is a wasteful number, since it uses less digits than its factorization.

72080660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124315 (or 124313 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 72080660 is about 8490.0329799124. The cubic root of 72080660 is about 416.1720580797.

Adding to 72080660 its reverse (6608027), we get a palindrome (78688687).

The spelling of 72080660 in words is "seventy-two million, eighty thousand, six hundred sixty".