266655 has 16 divisors (see below), whose sum is σ = 442080. Its totient is φ = 137088.

The previous prime is 266647. The next prime is 266663. The reversal of 266655 is 556662.

It is an interprime number because it is at equal distance from previous prime (266647) and next prime (266663).

It is not a de Polignac number, because 266655 - 2³ = 266647 is a prime.

It is a super-2 number, since 2×266655² = 142209778050, which contains 22 as substring.

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, 129 + ... + 741.

It is an arithmetic number, because the mean of its divisors is an integer number (27630).

2²⁶⁶⁶⁵⁵ is an apocalyptic number.

266655 is a deficient number, since it is larger than the sum of its proper divisors (175425).

266655 is a wasteful number, since it uses less digits than its factorization.

266655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650.

The product of its digits is 10800, while the sum is 30.

The square root of 266655 is about 516.3864831693. The cubic root of 266655 is about 64.3650202898.

The spelling of 266655 in words is "two hundred sixty-six thousand, six hundred fifty-five".