266956265 has 4 divisors (see below), whose sum is σ = 320347524. Its totient is φ = 213565008.

The previous prime is 266956243. The next prime is 266956271. The reversal of 266956265 is 562659662.

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 172633321 + 94322944 = 13139^2 + 9712^2 .

It is a cyclic number.

It is not a de Polignac number, because 266956265 - 2⁶ = 266956201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26695622 + ... + 26695631.

It is an arithmetic number, because the mean of its divisors is an integer number (80086881).

Almost surely, 2^266956265 is an apocalyptic number.

It is an amenable number.

266956265 is a deficient number, since it is larger than the sum of its proper divisors (53391259).

266956265 is an equidigital number, since it uses as much as digits as its factorization.

266956265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53391258.

The product of its digits is 1166400, while the sum is 47.

The square root of 266956265 is about 16338.7963142944. The cubic root of 266956265 is about 643.8925088717.

The spelling of 266956265 in words is "two hundred sixty-six million, nine hundred fifty-six thousand, two hundred sixty-five".