266500 has 48 divisors (see below), whose sum is σ = 642096. Its totient is φ = 96000.

The previous prime is 266491. The next prime is 266521. The reversal of 266500 is 5662.

It can be written as a sum of positive squares in 8 ways, for example, as 207936 + 58564 = 456^2 + 242^2 .

It is an Ulam number.

It is a zygodrome in base 9.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6480 + ... + 6520.

It is an arithmetic number, because the mean of its divisors is an integer number (13377).

2²⁶⁶⁵⁰⁰ is an apocalyptic number.

266500 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 266500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321048).

266500 is an abundant number, since it is smaller than the sum of its proper divisors (375596).

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

266500 is a wasteful number, since it uses less digits than its factorization.

266500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 266500 is about 516.2363799656. The cubic root of 266500 is about 64.3525466043.

The spelling of 266500 in words is "two hundred sixty-six thousand, five hundred".