16666666855 has 8 divisors (see below), whose sum is σ = 20030353200. Its totient is φ = 13313098176.

The previous prime is 16666666843. The next prime is 16666666897. The reversal of 16666666855 is 55866666661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16666666855 - 2⁷ = 16666666727 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16666666793 and 16666666802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2525790 + ... + 2532379.

It is an arithmetic number, because the mean of its divisors is an integer number (2503794150).

Almost surely, 2^16666666855 is an apocalyptic number.

16666666855 is a deficient number, since it is larger than the sum of its proper divisors (3363686345).

16666666855 is an equidigital number, since it uses as much as digits as its factorization.

16666666855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5058833.

The product of its digits is 55987200, while the sum is 61.

The spelling of 16666666855 in words is "sixteen billion, six hundred sixty-six million, six hundred sixty-six thousand, eight hundred fifty-five".