72133660 has 24 divisors (see below), whose sum is σ = 151724160. Its totient is φ = 28807104.

The previous prime is 72133639. The next prime is 72133687. The reversal of 72133660 is 6633127.

It is a congruent number.

It is an unprimeable number.

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, 11637 + ... + 16723.

It is an arithmetic number, because the mean of its divisors is an integer number (6321840).

Almost surely, 2^72133660 is an apocalyptic number.

It is an amenable number.

72133660 is an abundant number, since it is smaller than the sum of its proper divisors (79590500).

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

72133660 is a wasteful number, since it uses less digits than its factorization.

72133660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5805 (or 5803 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 72133660 is about 8493.1537134330. The cubic root of 72133660 is about 416.2740351111.

Adding to 72133660 its reverse (6633127), we get a palindrome (78766787).

The spelling of 72133660 in words is "seventy-two million, one hundred thirty-three thousand, six hundred sixty".