166668518333 has 8 divisors (see below), whose sum is σ = 170886501240. Its totient is φ = 162457816320.

The previous prime is 166668518287. The next prime is 166668518411. The reversal of 166668518333 is 333815866661.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 33336186724 + 133332331609 = 182582^2 + 365147^2 .

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 166668518333 - 2²⁴ = 166651741117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166668518633) 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 7 ways as a sum of consecutive naturals, for example, 1773848 + ... + 1865441.

It is an arithmetic number, because the mean of its divisors is an integer number (21360812655).

Almost surely, 2^166668518333 is an apocalyptic number.

It is an amenable number.

166668518333 is a deficient number, since it is larger than the sum of its proper divisors (4217982907).

166668518333 is a wasteful number, since it uses less digits than its factorization.

166668518333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640447.

The product of its digits is 11197440, while the sum is 56.

The spelling of 166668518333 in words is "one hundred sixty-six billion, six hundred sixty-eight million, five hundred eighteen thousand, three hundred thirty-three".