66560072 has 16 divisors (see below), whose sum is σ = 125568240. Its totient is φ = 33075216.

The previous prime is 66560071. The next prime is 66560101. The reversal of 66560072 is 27006566.

66560072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (66560071) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 24218 + ... + 26825.

It is an arithmetic number, because the mean of its divisors is an integer number (7848015).

Almost surely, 2^66560072 is an apocalyptic number.

It is an amenable number.

66560072 is a deficient number, since it is larger than the sum of its proper divisors (59008168).

66560072 is a wasteful number, since it uses less digits than its factorization.

66560072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51212 (or 51208 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 66560072 is about 8158.4356343603. The cubic root of 66560072 is about 405.2639076568.

The spelling of 66560072 in words is "sixty-six million, five hundred sixty thousand, seventy-two".