266780 has 12 divisors (see below), whose sum is σ = 560280. Its totient is φ = 106704.

The previous prime is 266767. The next prime is 266797. The reversal of 266780 is 87662.

It is a congruent number.

It is an unprimeable number.

266780 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6650 + ... + 6689.

It is an arithmetic number, because the mean of its divisors is an integer number (46690).

2²⁶⁶⁷⁸⁰ is an apocalyptic number.

266780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

266780 is an abundant number, since it is smaller than the sum of its proper divisors (293500).

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

266780 is a wasteful number, since it uses less digits than its factorization.

266780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13348 (or 13346 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 266780 is about 516.5075023656. The cubic root of 266780 is about 64.3750761931.

The spelling of 266780 in words is "two hundred sixty-six thousand, seven hundred eighty".