16668333516685 has 32 divisors (see below), whose sum is σ = 21128277932640. Its totient is φ = 12605792145408.

The previous prime is 16668333516577. The next prime is 16668333516701. The reversal of 16668333516685 is 58661533386661.

16668333516685 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 16 ways, for example, as 235257981156 + 16433075535529 = 485034^2 + 4053773^2 .

It is a cyclic number.

It is not a de Polignac number, because 16668333516685 - 2⁹ = 16668333516173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16668333516685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4296982 + ... + 7197271.

It is an arithmetic number, because the mean of its divisors is an integer number (660258685395).

Almost surely, 2^{16668333516685} is an apocalyptic number.

It is an amenable number.

16668333516685 is a deficient number, since it is larger than the sum of its proper divisors (4459944415955).

16668333516685 is a wasteful number, since it uses less digits than its factorization.

16668333516685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11494497.

The product of its digits is 335923200, while the sum is 67.

The spelling of 16668333516685 in words is "sixteen trillion, six hundred sixty-eight billion, three hundred thirty-three million, five hundred sixteen thousand, six hundred eighty-five".