66668888886688 has 24 divisors (see below), whose sum is σ = 143186590905120. Its totient is φ = 30304040402880.

The previous prime is 66668888886661. The next prime is 66668888886701. The reversal of 66668888886688 is 88668888886666.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66668888886593 and 66668888886602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94700125908 + ... + 94700126611.

It is an arithmetic number, because the mean of its divisors is an integer number (5966107954380).

It is a self-describing number.

Almost surely, 2^{66668888886688} is an apocalyptic number.

It is an amenable number.

66668888886688 is an abundant number, since it is smaller than the sum of its proper divisors (76517702018432).

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

66668888886688 is a wasteful number, since it uses less digits than its factorization.

66668888886688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189400252540 (or 189400252532 counting only the distinct ones).

The product of its digits is 782757789696, while the sum is 100.

It can be divided in two parts, 66668888 and 886688, that added together give a palindrome (67555576).

The spelling of 66668888886688 in words is "sixty-six trillion, six hundred sixty-eight billion, eight hundred eighty-eight million, eight hundred eighty-six thousand, six hundred eighty-eight".