66240868 has 12 divisors (see below), whose sum is σ = 117389440. Its totient is φ = 32701032.

The previous prime is 66240833. The next prime is 66240877. The reversal of 66240868 is 86804266.

66240868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 66240868.

It is an unprimeable number.

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, 104496 + ... + 105127.

Almost surely, 2^66240868 is an apocalyptic number.

It is an amenable number.

66240868 is a deficient number, since it is larger than the sum of its proper divisors (51148572).

66240868 is a wasteful number, since it uses less digits than its factorization.

66240868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209706 (or 209704 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 66240868 is about 8138.8493044164. The cubic root of 66240868 is about 404.6150241045.

The spelling of 66240868 in words is "sixty-six million, two hundred forty thousand, eight hundred sixty-eight".