266880 has 64 divisors (see below), whose sum is σ = 856800. Its totient is φ = 70656.

The previous prime is 266867. The next prime is 266891. The reversal of 266880 is 88662.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

266880 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 7 ways as a sum of consecutive naturals, for example, 1851 + ... + 1989.

2²⁶⁶⁸⁸⁰ is an apocalyptic number.

266880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 266880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (428400).

266880 is an abundant number, since it is smaller than the sum of its proper divisors (589920).

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

266880 is a wasteful number, since it uses less digits than its factorization.

266880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 266880 is about 516.6042973108. The cubic root of 266880 is about 64.3831186543.

The spelling of 266880 in words is "two hundred sixty-six thousand, eight hundred eighty".