266495 has 4 divisors (see below), whose sum is σ = 319800. Its totient is φ = 213192.

The previous prime is 266491. The next prime is 266521. The reversal of 266495 is 594662.

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

It is a cyclic number.

It is not a de Polignac number, because 266495 - 2² = 266491 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266491) 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, 26645 + ... + 26654.

It is an arithmetic number, because the mean of its divisors is an integer number (79950).

266495 is a Friedman number, since it can be written as 66^2-5+4^9, using all its digits and the basic arithmetic operations.

2²⁶⁶⁴⁹⁵ is an apocalyptic number.

266495 is a deficient number, since it is larger than the sum of its proper divisors (53305).

266495 is an equidigital number, since it uses as much as digits as its factorization.

266495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53304.

The product of its digits is 12960, while the sum is 32.

The square root of 266495 is about 516.2315372001. The cubic root of 266495 is about 64.3521441468.

The spelling of 266495 in words is "two hundred sixty-six thousand, four hundred ninety-five".