266255 has 16 divisors (see below), whose sum is σ = 359424. Its totient is φ = 187680.

The previous prime is 266239. The next prime is 266261. The reversal of 266255 is 552662.

It is a happy number.

It is a Cunningham number, because it is equal to 516²-1.

It is not a de Polignac number, because 266255 - 2⁴ = 266239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2534 + ... + 2636.

It is an arithmetic number, because the mean of its divisors is an integer number (22464).

2²⁶⁶²⁵⁵ is an apocalyptic number.

266255 is a deficient number, since it is larger than the sum of its proper divisors (93169).

266255 is a wasteful number, since it uses less digits than its factorization.

266255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166.

The product of its digits is 3600, while the sum is 26.

The square root of 266255 is about 515.9990310068. Note that the first 3 decimals coincide. The cubic root of 266255 is about 64.3328202655.

The spelling of 266255 in words is "two hundred sixty-six thousand, two hundred fifty-five".