266944243 has 4 divisors (see below), whose sum is σ = 280993960. Its totient is φ = 252894528.

The previous prime is 266944219. The next prime is 266944247. The reversal of 266944243 is 342449662.

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 266944243 - 2⁹ = 266943731 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 266944196 and 266944205.

It is not an unprimeable number, because it can be changed into a prime (266944247) 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, 7024830 + ... + 7024867.

It is an arithmetic number, because the mean of its divisors is an integer number (70248490).

Almost surely, 2^266944243 is an apocalyptic number.

266944243 is a deficient number, since it is larger than the sum of its proper divisors (14049717).

266944243 is a wasteful number, since it uses less digits than its factorization.

266944243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14049716.

The product of its digits is 248832, while the sum is 40.

The square root of 266944243 is about 16338.4284127942. The cubic root of 266944243 is about 643.8828431287.

The spelling of 266944243 in words is "two hundred sixty-six million, nine hundred forty-four thousand, two hundred forty-three".