266765441 has 4 divisors (see below), whose sum is σ = 268712772. Its totient is φ = 264818112.

The previous prime is 266765419. The next prime is 266765459. The reversal of 266765441 is 144567662.

It is a happy number.

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 78499600 + 188265841 = 8860^2 + 13721^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266765441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (266705441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 973460 + ... + 973733.

It is an arithmetic number, because the mean of its divisors is an integer number (67178193).

Almost surely, 2^266765441 is an apocalyptic number.

It is an amenable number.

266765441 is a deficient number, since it is larger than the sum of its proper divisors (1947331).

266765441 is a wasteful number, since it uses less digits than its factorization.

266765441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1947330.

The product of its digits is 241920, while the sum is 41.

The square root of 266765441 is about 16332.9556725046. The cubic root of 266765441 is about 643.7390512355.

The spelling of 266765441 in words is "two hundred sixty-six million, seven hundred sixty-five thousand, four hundred forty-one".