266256 has 45 divisors (see below), whose sum is σ = 762879. Its totient is φ = 86688.

The previous prime is 266239. The next prime is 266261. The reversal of 266256 is 652662.

The square root of 266256 is 516.

It is a perfect power (a square), and thus also a powerful number.

Its product of digits (4320) is a multiple of the sum of its prime divisors (48).

It is an unprimeable number.

266256 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 8 ways as a sum of consecutive naturals, for example, 6171 + ... + 6213.

2²⁶⁶²⁵⁶ is an apocalyptic number.

266256 is the 516-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266256

266256 is an abundant number, since it is smaller than the sum of its proper divisors (496623).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

266256 is a wasteful number, since it uses less digits than its factorization.

266256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 48 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The cubic root of 266256 is about 64.3329008058.

The spelling of 266256 in words is "two hundred sixty-six thousand, two hundred fifty-six".