266533 has 4 divisors (see below), whose sum is σ = 268108. Its totient is φ = 264960.

The previous prime is 266521. The next prime is 266549. The reversal of 266533 is 335662.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91809 + 174724 = 303^2 + 418^2 .

It is a cyclic number.

It is not a de Polignac number, because 266533 - 2¹⁷ = 135461 is a prime.

It is a d-powerful number, because it can be written as 2 + 6⁴ + 5⁷ + 6⁵ + 3⁷ + 3¹¹ .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266498 and 266507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 498 + ... + 883.

It is an arithmetic number, because the mean of its divisors is an integer number (67027).

2²⁶⁶⁵³³ is an apocalyptic number.

It is an amenable number.

266533 is a deficient number, since it is larger than the sum of its proper divisors (1575).

266533 is a wasteful number, since it uses less digits than its factorization.

266533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1574.

The product of its digits is 3240, while the sum is 25.

The square root of 266533 is about 516.2683410786. The cubic root of 266533 is about 64.3552026973.

It can be divided in two parts, 266 and 533, that multiplied together give a triangular number (141778 = T₅₃₂).

The spelling of 266533 in words is "two hundred sixty-six thousand, five hundred thirty-three".