266355 has 16 divisors (see below), whose sum is σ = 473760. Its totient is φ = 141984.

The previous prime is 266353. The next prime is 266359. The reversal of 266355 is 553662.

266355 is a `hidden beast` number, since 26 + 635 + 5 = 666.

It is not a de Polignac number, because 266355 - 2¹ = 266353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (266351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 852 + ... + 1121.

It is an arithmetic number, because the mean of its divisors is an integer number (29610).

2²⁶⁶³⁵⁵ is an apocalyptic number.

266355 is a deficient number, since it is larger than the sum of its proper divisors (207405).

266355 is a wasteful number, since it uses less digits than its factorization.

266355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1987 (or 1981 counting only the distinct ones).

The product of its digits is 5400, while the sum is 27.

The square root of 266355 is about 516.0959213170. The cubic root of 266355 is about 64.3408732934.

The spelling of 266355 in words is "two hundred sixty-six thousand, three hundred fifty-five".