266413243 has 4 divisors (see below), whose sum is σ = 266735440. Its totient is φ = 266091048.

The previous prime is 266413241. The next prime is 266413247. The reversal of 266413243 is 342314662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342314662 = 2 ⋅171157331.

It is a cyclic number.

It is not a de Polignac number, because 266413243 - 2¹ = 266413241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266413241) 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, 159855 + ... + 161512.

It is an arithmetic number, because the mean of its divisors is an integer number (66683860).

Almost surely, 2^266413243 is an apocalyptic number.

266413243 is a deficient number, since it is larger than the sum of its proper divisors (322197).

266413243 is an equidigital number, since it uses as much as digits as its factorization.

266413243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322196.

The product of its digits is 20736, while the sum is 31.

The square root of 266413243 is about 16322.1702907426. The cubic root of 266413243 is about 643.4556268955.

The spelling of 266413243 in words is "two hundred sixty-six million, four hundred thirteen thousand, two hundred forty-three".