72685660 has 24 divisors (see below), whose sum is σ = 154155456. Its totient is φ = 28785600.

The previous prime is 72685651. The next prime is 72685667. The reversal of 72685660 is 6658627.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72685667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15972 + ... + 20011.

It is an arithmetic number, because the mean of its divisors is an integer number (6423144).

Almost surely, 2^72685660 is an apocalyptic number.

It is an amenable number.

72685660 is an abundant number, since it is smaller than the sum of its proper divisors (81469796).

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

72685660 is a wasteful number, since it uses less digits than its factorization.

72685660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36093 (or 36091 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 72685660 is about 8525.5885427342. The cubic root of 72685660 is about 417.3331782389. Note that the first 3 decimals are identical.

The spelling of 72685660 in words is "seventy-two million, six hundred eighty-five thousand, six hundred sixty".