66248866 has 16 divisors (see below), whose sum is σ = 102858840. Its totient is φ = 31979520.

The previous prime is 66248851. The next prime is 66248869. The reversal of 66248866 is 66884266.

66248866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 24710841 + 41538025 = 4971^2 + 6445^2 .

It is not an unprimeable number, because it can be changed into a prime (66248869) 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 7 ways as a sum of consecutive naturals, for example, 3790 + ... + 12118.

Almost surely, 2^66248866 is an apocalyptic number.

66248866 is a deficient number, since it is larger than the sum of its proper divisors (36609974).

66248866 is a wasteful number, since it uses less digits than its factorization.

66248866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8469.

The product of its digits is 663552, while the sum is 46.

The square root of 66248866 is about 8139.3406366855. The cubic root of 66248866 is about 404.6313080132.

The spelling of 66248866 in words is "sixty-six million, two hundred forty-eight thousand, eight hundred sixty-six".