266740 has 12 divisors (see below), whose sum is σ = 560196. Its totient is φ = 106688.

The previous prime is 266719. The next prime is 266759. The reversal of 266740 is 47662.

It can be written as a sum of positive squares in 2 ways, for example, as 85264 + 181476 = 292^2 + 426^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6649 + ... + 6688.

It is an arithmetic number, because the mean of its divisors is an integer number (46683).

2²⁶⁶⁷⁴⁰ is an apocalyptic number.

266740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266740 is an abundant number, since it is smaller than the sum of its proper divisors (293456).

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

266740 is a wasteful number, since it uses less digits than its factorization.

266740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13346 (or 13344 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 266740 is about 516.4687793081. The cubic root of 266740 is about 64.3718586458.

The spelling of 266740 in words is "two hundred sixty-six thousand, seven hundred forty".