66888888888898 has 32 divisors (see below), whose sum is σ = 105245062560000. Its totient is φ = 31840541416320.

The previous prime is 66888888888881. The next prime is 66888888889021. The reversal of 66888888888898 is 89888888888866.

66888888888898 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 = 66888888888794 and 66888888888803.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6104548 + ... + 13078351.

It is an arithmetic number, because the mean of its divisors is an integer number (3288908205000).

Almost surely, 2^{66888888888898} is an apocalyptic number.

66888888888898 is a deficient number, since it is larger than the sum of its proper divisors (38356173671102).

66888888888898 is a wasteful number, since it uses less digits than its factorization.

66888888888898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19183770.

The product of its digits is 2783138807808, while the sum is 109.

The spelling of 66888888888898 in words is "sixty-six trillion, eight hundred eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred ninety-eight".