66886688668888 has 32 divisors (see below), whose sum is σ = 137346030369360. Its totient is φ = 30284740526080.

The previous prime is 66886688668871. The next prime is 66886688668939. The reversal of 66886688668888 is 88886688668866.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 66886688668793 and 66886688668802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1478724481 + ... + 1478769712.

It is a self-describing number.

Almost surely, 2^{66886688668888} is an apocalyptic number.

It is an amenable number.

66886688668888 is an abundant number, since it is smaller than the sum of its proper divisors (70459341700472).

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

66886688668888 is a wasteful number, since it uses less digits than its factorization.

66886688668888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2957494467 (or 2957494463 counting only the distinct ones).

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

It can be divided in two parts, 66886688 and 668888, that added together give a palindrome (67555576).

The spelling of 66886688668888 in words is "sixty-six trillion, eight hundred eighty-six billion, six hundred eighty-eight million, six hundred sixty-eight thousand, eight hundred eighty-eight".