266516 has 6 divisors (see below), whose sum is σ = 466410. Its totient is φ = 133256.

The previous prime is 266491. The next prime is 266521. The reversal of 266516 is 615662.

266516 is nontrivially palindromic in base 16.

It can be written as a sum of positive squares in only one way, i.e., 198916 + 67600 = 446^2 + 260^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 266516.

It is an unprimeable number.

266516 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33311 + ... + 33318.

It is an arithmetic number, because the mean of its divisors is an integer number (77735).

2²⁶⁶⁵¹⁶ is an apocalyptic number.

It is an amenable number.

266516 is a deficient number, since it is larger than the sum of its proper divisors (199894).

266516 is a wasteful number, since it uses less digits than its factorization.

266516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66633 (or 66631 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 266516 is about 516.2518765099. The cubic root of 266516 is about 64.3538344344.

The spelling of 266516 in words is "two hundred sixty-six thousand, five hundred sixteen".