• 266 can be written using four 4's:

See also 113.

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266 has 8 divisors (see below), whose sum is σ = 480. Its totient is φ = 108.

The previous prime is 263. The next prime is 269. The reversal of 266 is 662.

266 = T₅ + T₆ + ... + T₁₁.

266 is nontrivially palindromic in base 11.

266 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (263) and next prime (269).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (14), and also a Moran number because the ratio is a prime number: 19 = 266 / (2 + 6 + 6).

266 is a modest number, since divided by 66 gives 2 as remainder.

266 is a nontrivial repdigit in base 11.

It is a plaindrome in base 6, base 10, base 11 and base 15.

It is a nialpdrome in base 7 and base 11.

It is a zygodrome in base 6 and base 11.

It is a self number, because there is not a number n which added to its sum of digits gives 266.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 266.

It is not an unprimeable number, because it can be changed into a prime (263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5 + ... + 23.

It is an arithmetic number, because the mean of its divisors is an integer number (60).

266 is a deficient number, since it is larger than the sum of its proper divisors (214).

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

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

The sum of its prime factors is 28.

The product of its digits is 72, while the sum is 14.

The square root of 266 is about 16.3095064303. The cubic root of 266 is about 6.4312275914.

Subtracting from 266 its sum of digits (14), we obtain a palindrome (252).

It can be divided in two parts, 26 and 6, that added together give a 5-th power (32 = 2⁵).

The spelling of 266 in words is "two hundred sixty-six", and thus it is an aban number.