266660 has 24 divisors (see below), whose sum is σ = 571200.
Its totient is φ = 104544.
The previous prime is 266647. The next prime is 266663. The reversal of 266660 is 66662.
It is a super-2 number, since 2×2666602 = 142215111200, which contains 22 as substring.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 266660.
It is not an unprimeable number, because it can be changed into a prime (266663) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1241 + ... + 1439.
It is an arithmetic number, because the mean of its divisors is an integer number (23800).
2266660 is an apocalyptic number.
266660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
266660 is an abundant number, since it is smaller than the sum of its proper divisors (304540).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
266660 is a wasteful number, since it uses less digits than its factorization.
266660 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 275 (or 273 counting only the distinct ones).
The product of its (nonzero) digits is 2592, while the sum is 26.
The square root of 266660 is about 516.3913244817.
The cubic root of 266660 is about 64.3654225862.
The spelling of 266660 in words is "two hundred sixty-six thousand, six hundred sixty".