266161 has 8 divisors (see below), whose sum is σ = 311040. Its totient is φ = 223008.

The previous prime is 266159. The next prime is 266177. The reversal of 266161 is 161662.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 266161 - 2¹ = 266159 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 (266111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76 + ... + 733.

It is an arithmetic number, because the mean of its divisors is an integer number (38880).

2²⁶⁶¹⁶¹ is an apocalyptic number.

It is an amenable number.

266161 is a deficient number, since it is larger than the sum of its proper divisors (44879).

266161 is an equidigital number, since it uses as much as digits as its factorization.

266161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863.

The product of its digits is 432, while the sum is 22.

The square root of 266161 is about 515.9079375237. The cubic root of 266161 is about 64.3252485806.

The spelling of 266161 in words is "two hundred sixty-six thousand, one hundred sixty-one".