266530 has 16 divisors (see below), whose sum is σ = 523584. Its totient is φ = 96880.

The previous prime is 266521. The next prime is 266549. The reversal of 266530 is 35662.

266530 is nontrivially palindromic in base 9.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a zygodrome in base 9.

It is a congruent number.

It is an unprimeable number.

266530 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1102 + ... + 1321.

It is an arithmetic number, because the mean of its divisors is an integer number (32724).

2²⁶⁶⁵³⁰ is an apocalyptic number.

266530 is a deficient number, since it is larger than the sum of its proper divisors (257054).

266530 is a wasteful number, since it uses less digits than its factorization.

266530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 266530 is about 516.2654356046. The cubic root of 266530 is about 64.3549612434.

It can be divided in two parts, 26 and 6530, that added together give a palindrome (6556).

The spelling of 266530 in words is "two hundred sixty-six thousand, five hundred thirty".