166341352165 has 4 divisors (see below), whose sum is σ = 199609622604. Its totient is φ = 133073081728.

The previous prime is 166341352153. The next prime is 166341352189. The reversal of 166341352165 is 561253143661.

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 112776415684 + 53564936481 = 335822^2 + 231441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166341352165 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 16634135212 + ... + 16634135221.

It is an arithmetic number, because the mean of its divisors is an integer number (49902405651).

Almost surely, 2^166341352165 is an apocalyptic number.

It is an amenable number.

166341352165 is a deficient number, since it is larger than the sum of its proper divisors (33268270439).

166341352165 is an equidigital number, since it uses as much as digits as its factorization.

166341352165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33268270438.

The product of its digits is 388800, while the sum is 43.

The spelling of 166341352165 in words is "one hundred sixty-six billion, three hundred forty-one million, three hundred fifty-two thousand, one hundred sixty-five".