266091 has 8 divisors (see below), whose sum is σ = 405504. Its totient is φ = 152040.

The previous prime is 266089. The next prime is 266093. The reversal of 266091 is 190662.

It is an interprime number because it is at equal distance from previous prime (266089) and next prime (266093).

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

It is not a de Polignac number, because 266091 - 2¹ = 266089 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 266091.

It is not an unprimeable number, because it can be changed into a prime (266093) 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, 6315 + ... + 6356.

It is an arithmetic number, because the mean of its divisors is an integer number (50688).

2²⁶⁶⁰⁹¹ is an apocalyptic number.

266091 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

266091 is a deficient number, since it is larger than the sum of its proper divisors (139413).

266091 is a wasteful number, since it uses less digits than its factorization.

266091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12681.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 266091 is about 515.8400915012. The cubic root of 266091 is about 64.3196089337.

The spelling of 266091 in words is "two hundred sixty-six thousand, ninety-one".