166834816285 has 4 divisors (see below), whose sum is σ = 200201779548. Its totient is φ = 133467853024.

The previous prime is 166834816279. The next prime is 166834816363. The reversal of 166834816285 is 582618438661.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 117113843961 + 49720972324 = 342219^2 + 222982^2 .

It is a cyclic number.

It is not a de Polignac number, because 166834816285 - 2⁹ = 166834815773 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16683481624 + ... + 16683481633.

It is an arithmetic number, because the mean of its divisors is an integer number (50050444887).

Almost surely, 2^166834816285 is an apocalyptic number.

It is an amenable number.

166834816285 is a deficient number, since it is larger than the sum of its proper divisors (33366963263).

166834816285 is an equidigital number, since it uses as much as digits as its factorization.

166834816285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33366963262.

The product of its digits is 13271040, while the sum is 58.

The spelling of 166834816285 in words is "one hundred sixty-six billion, eight hundred thirty-four million, eight hundred sixteen thousand, two hundred eighty-five".