266944 has 28 divisors (see below), whose sum is σ = 547624. Its totient is φ = 129024.

The previous prime is 266933. The next prime is 266947. The reversal of 266944 is 449662.

266944 is nontrivially palindromic in base 14.

It is not an unprimeable number, because it can be changed into a prime (266947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2704 + ... + 2800.

It is an arithmetic number, because the mean of its divisors is an integer number (19558).

2²⁶⁶⁹⁴⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273812).

266944 is an abundant number, since it is smaller than the sum of its proper divisors (280680).

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

266944 is an equidigital number, since it uses as much as digits as its factorization.

266944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 142 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 266944 is about 516.6662365590. Note that the first 3 decimals coincide. The cubic root of 266944 is about 64.3882647753.

The spelling of 266944 in words is "two hundred sixty-six thousand, nine hundred forty-four".