66868288668 has 30 divisors (see below), whose sum is σ = 174806915976. Its totient is φ = 22289429448.

The previous prime is 66868288661. The next prime is 66868288703. The reversal of 66868288668 is 86688286866.

66868288668 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 = 66868288596 and 66868288605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66868288661) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 103191480 + ... + 103192127.

Almost surely, 2^66868288668 is an apocalyptic number.

It is an amenable number.

66868288668 is an abundant number, since it is smaller than the sum of its proper divisors (107938627308).

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

66868288668 is a wasteful number, since it uses less digits than its factorization.

66868288668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206383623 (or 206383612 counting only the distinct ones).

The product of its digits is 509607936, while the sum is 72.

The spelling of 66868288668 in words is "sixty-six billion, eight hundred sixty-eight million, two hundred eighty-eight thousand, six hundred sixty-eight".