66808822240863 has 6 divisors (see below), whose sum is σ = 96501632125704. Its totient is φ = 44539214827236.

The previous prime is 66808822240817. The next prime is 66808822240879. The reversal of 66808822240863 is 36804222880866.

66808822240863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66808822240863 - 2⁸ = 66808822240607 is a prime.

It is a super-2 number, since 2×66808822240863² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 66808822240863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66808822240813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3711601235595 + ... + 3711601235612.

It is an arithmetic number, because the mean of its divisors is an integer number (16083605354284).

Almost surely, 2^{66808822240863} is an apocalyptic number.

66808822240863 is a deficient number, since it is larger than the sum of its proper divisors (29692809884841).

66808822240863 is a wasteful number, since it uses less digits than its factorization.

66808822240863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7423202471213 (or 7423202471210 counting only the distinct ones).

The product of its (nonzero) digits is 84934656, while the sum is 63.

The spelling of 66808822240863 in words is "sixty-six trillion, eight hundred eight billion, eight hundred twenty-two million, two hundred forty thousand, eight hundred sixty-three".