166845027005 has 4 divisors (see below), whose sum is σ = 200214032412. Its totient is φ = 133476021600.

The previous prime is 166845026983. The next prime is 166845027101. The reversal of 166845027005 is 500720548661.

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 131436701764 + 35408325241 = 362542^2 + 188171^2 .

It is not a de Polignac number, because 166845027005 - 2¹² = 166845022909 is a prime.

It is a Duffinian number.

It is a Curzon 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, 16684502696 + ... + 16684502705.

It is an arithmetic number, because the mean of its divisors is an integer number (50053508103).

Almost surely, 2^166845027005 is an apocalyptic number.

It is an amenable number.

166845027005 is a deficient number, since it is larger than the sum of its proper divisors (33369005407).

166845027005 is an equidigital number, since it uses as much as digits as its factorization.

166845027005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33369005406.

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 166845027005 in words is "one hundred sixty-six billion, eight hundred forty-five million, twenty-seven thousand, five".