266555825 has 12 divisors (see below), whose sum is σ = 341192448. Its totient is φ = 206365200.

The previous prime is 266555789. The next prime is 266555827. The reversal of 266555825 is 528555662.

It is not a de Polignac number, because 266555825 - 2¹⁰ = 266554801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (266555827) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 171197 + ... + 172746.

It is an arithmetic number, because the mean of its divisors is an integer number (28432704).

Almost surely, 2^266555825 is an apocalyptic number.

266555825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

266555825 is a deficient number, since it is larger than the sum of its proper divisors (74636623).

266555825 is a wasteful number, since it uses less digits than its factorization.

266555825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343984 (or 343979 counting only the distinct ones).

The product of its digits is 720000, while the sum is 44.

The square root of 266555825 is about 16326.5374467460. The cubic root of 266555825 is about 643.5703970010.

The spelling of 266555825 in words is "two hundred sixty-six million, five hundred fifty-five thousand, eight hundred twenty-five".