266790265 has 16 divisors (see below), whose sum is σ = 387407232. Its totient is φ = 172180224.

The previous prime is 266790259. The next prime is 266790301. The reversal of 266790265 is 562097662.

It is a cyclic number.

It is not a de Polignac number, because 266790265 - 2¹¹ = 266788217 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 15 ways as a sum of consecutive naturals, for example, 223599 + ... + 224788.

It is an arithmetic number, because the mean of its divisors is an integer number (24212952).

Almost surely, 2^266790265 is an apocalyptic number.

It is an amenable number.

266790265 is a deficient number, since it is larger than the sum of its proper divisors (120616967).

266790265 is a wasteful number, since it uses less digits than its factorization.

266790265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448416.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 266790265 is about 16333.7155907650. The cubic root of 266790265 is about 643.7590184428.

The spelling of 266790265 in words is "two hundred sixty-six million, seven hundred ninety thousand, two hundred sixty-five".