2066905173 has 4 divisors (see below), whose sum is σ = 2755873568. Its totient is φ = 1377936780.

The previous prime is 2066905171. The next prime is 2066905193. The reversal of 2066905173 is 3715096602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2066905173 - 2¹ = 2066905171 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2066905171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344484193 + ... + 344484198.

It is an arithmetic number, because the mean of its divisors is an integer number (688968392).

Almost surely, 2^2066905173 is an apocalyptic number.

It is an amenable number.

2066905173 is a deficient number, since it is larger than the sum of its proper divisors (688968395).

2066905173 is an equidigital number, since it uses as much as digits as its factorization.

2066905173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688968394.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 2066905173 is about 45463.2288008672. The cubic root of 2066905173 is about 1273.8164432290.

The spelling of 2066905173 in words is "two billion, sixty-six million, nine hundred five thousand, one hundred seventy-three".