16666668333855 has 48 divisors (see below), whose sum is σ = 30011319321984. Its totient is φ = 8873322176160.

The previous prime is 16666668333779. The next prime is 16666668333859. The reversal of 16666668333855 is 55833386666661.

It is not a de Polignac number, because 16666668333855 - 2¹⁴ = 16666668317471 is a prime.

It is a super-2 number, since 2×16666668333855² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16666668333859) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 11317989 + ... + 12705518.

It is an arithmetic number, because the mean of its divisors is an integer number (625235819208).

Almost surely, 2^{16666668333855} is an apocalyptic number.

16666668333855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

16666668333855 is a deficient number, since it is larger than the sum of its proper divisors (13344650988129).

16666668333855 is an equidigital number, since it uses as much as digits as its factorization.

16666668333855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24024098 (or 24024086 counting only the distinct ones).

The product of its digits is 2015539200, while the sum is 72.

The spelling of 16666668333855 in words is "sixteen trillion, six hundred sixty-six billion, six hundred sixty-eight million, three hundred thirty-three thousand, eight hundred fifty-five".