266505255 has 32 divisors (see below), whose sum is σ = 494392320. Its totient is φ = 135954720.

The previous prime is 266505251. The next prime is 266505263. The reversal of 266505255 is 552505662.

It is not a de Polignac number, because 266505255 - 2² = 266505251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266505251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39811 + ... + 46020.

It is an arithmetic number, because the mean of its divisors is an integer number (15449760).

Almost surely, 2^266505255 is an apocalyptic number.

266505255 is a deficient number, since it is larger than the sum of its proper divisors (227887065).

266505255 is a wasteful number, since it uses less digits than its factorization.

266505255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85868 (or 85862 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The square root of 266505255 is about 16324.9886676837. The cubic root of 266505255 is about 643.5296958166.

It can be divided in two parts, 266 and 505255, that added together give a square (505521 = 711²).

The spelling of 266505255 in words is "two hundred sixty-six million, five hundred five thousand, two hundred fifty-five".