266160605 has 4 divisors (see below), whose sum is σ = 319392732. Its totient is φ = 212928480.

The previous prime is 266160589. The next prime is 266160613. The reversal of 266160605 is 506061662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 506061662 = 2 ⋅253030831.

It can be written as a sum of positive squares in 2 ways, for example, as 124121881 + 142038724 = 11141^2 + 11918^2 .

It is not a de Polignac number, because 266160605 - 2⁴ = 266160589 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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26616056 + ... + 26616065.

It is an arithmetic number, because the mean of its divisors is an integer number (79848183).

Almost surely, 2^266160605 is an apocalyptic number.

It is an amenable number.

266160605 is a deficient number, since it is larger than the sum of its proper divisors (53232127).

266160605 is an equidigital number, since it uses as much as digits as its factorization.

266160605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53232126.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 266160605 is about 16314.4293495053. The cubic root of 266160605 is about 643.2521675965.

The spelling of 266160605 in words is "two hundred sixty-six million, one hundred sixty thousand, six hundred five".