266493 has 8 divisors (see below), whose sum is σ = 357856. Its totient is φ = 176400.

The previous prime is 266491. The next prime is 266521. The reversal of 266493 is 394662.

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

It is not a de Polignac number, because 266493 - 2¹ = 266491 is a prime.

266493 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 266493.

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 7 ways as a sum of consecutive naturals, for example, 423 + ... + 843.

It is an arithmetic number, because the mean of its divisors is an integer number (44732).

2²⁶⁶⁴⁹³ is an apocalyptic number.

It is an amenable number.

266493 is a deficient number, since it is larger than the sum of its proper divisors (91363).

266493 is a wasteful number, since it uses less digits than its factorization.

266493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635.

The product of its digits is 7776, while the sum is 30.

The square root of 266493 is about 516.2296000812. The cubic root of 266493 is about 64.3519831624.

The spelling of 266493 in words is "two hundred sixty-six thousand, four hundred ninety-three".