66560768 has 18 divisors (see below), whose sum is σ = 132862044. Its totient is φ = 33280256.

The previous prime is 66560761. The next prime is 66560773. The reversal of 66560768 is 86706566.

66560768 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 (66560761) 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 as a sum of consecutive naturals, namely, 129746 + ... + 130257.

Almost surely, 2^66560768 is an apocalyptic number.

It is an amenable number.

66560768 is a deficient number, since it is larger than the sum of its proper divisors (66301276).

66560768 is an equidigital number, since it uses as much as digits as its factorization.

66560768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260019 (or 260005 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 66560768 is about 8158.4782894851. The cubic root of 66560768 is about 405.2653202289.

The spelling of 66560768 in words is "sixty-six million, five hundred sixty thousand, seven hundred sixty-eight".