16666666859 has 4 divisors (see below), whose sum is σ = 16690443120. Its totient is φ = 16642890600.

The previous prime is 16666666843. The next prime is 16666666897. The reversal of 16666666859 is 95866666661.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16666666859 - 2⁴ = 16666666843 is a prime.

It is a super-3 number, since 3×16666666859³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16666666795 and 16666666804.

It is not an unprimeable number, because it can be changed into a prime (16666666459) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11887079 + ... + 11888480.

It is an arithmetic number, because the mean of its divisors is an integer number (4172610780).

Almost surely, 2^16666666859 is an apocalyptic number.

16666666859 is a deficient number, since it is larger than the sum of its proper divisors (23776261).

16666666859 is an equidigital number, since it uses as much as digits as its factorization.

16666666859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23776260.

The product of its digits is 100776960, while the sum is 65.

The spelling of 16666666859 in words is "sixteen billion, six hundred sixty-six million, six hundred sixty-six thousand, eight hundred fifty-nine".