66863836866 has 32 divisors (see below), whose sum is σ = 139987831680. Its totient is φ = 21250779264.

The previous prime is 66863836861. The next prime is 66863836877.

66863836866 is nontrivially palindromic in base 10.

66863836866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 66863836797 and 66863836806.

It is not an unprimeable number, because it can be changed into a prime (66863836861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 730801 + ... + 817188.

It is an arithmetic number, because the mean of its divisors is an integer number (4374619740).

Almost surely, 2^66863836866 is an apocalyptic number.

66863836866 is an abundant number, since it is smaller than the sum of its proper divisors (73123994814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66863836866 is a wasteful number, since it uses less digits than its factorization.

66863836866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1548330.

The product of its digits is 214990848, while the sum is 66.

The spelling of 66863836866 in words is "sixty-six billion, eight hundred sixty-three million, eight hundred thirty-six thousand, eight hundred sixty-six".