266920 has 16 divisors (see below), whose sum is σ = 600660. Its totient is φ = 106752.

The previous prime is 266909. The next prime is 266921. The reversal of 266920 is 29662.

It can be written as a sum of positive squares in 2 ways, for example, as 232324 + 34596 = 482^2 + 186^2 .

It is not an unprimeable number, because it can be changed into a prime (266921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3297 + ... + 3376.

2²⁶⁶⁹²⁰ is an apocalyptic number.

266920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266920 is an abundant number, since it is smaller than the sum of its proper divisors (333740).

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

266920 is a wasteful number, since it uses less digits than its factorization.

266920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6684 (or 6680 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 266920 is about 516.6430102111. The cubic root of 266920 is about 64.3863350763.

The spelling of 266920 in words is "two hundred sixty-six thousand, nine hundred twenty".