266985 has 24 divisors (see below), whose sum is σ = 491400. Its totient is φ = 133632.

The previous prime is 266983. The next prime is 266993. The reversal of 266985 is 589662.

It can be written as a sum of positive squares in 4 ways, for example, as 82944 + 184041 = 288^2 + 429^2 .

It is not a de Polignac number, because 266985 - 2¹ = 266983 is a prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 266985.

It is not an unprimeable number, because it can be changed into a prime (266983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 591 + ... + 939.

It is an arithmetic number, because the mean of its divisors is an integer number (20475).

2²⁶⁶⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

266985 is a deficient number, since it is larger than the sum of its proper divisors (224415).

266985 is a wasteful number, since it uses less digits than its factorization.

266985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 374 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 266985 is about 516.7059124879. The cubic root of 266985 is about 64.3915610767.

The spelling of 266985 in words is "two hundred sixty-six thousand, nine hundred eighty-five".