266549 has 2 divisors, whose sum is σ = 266550. Its totient is φ = 266548.

The previous prime is 266521. The next prime is 266587. The reversal of 266549 is 945662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 232324 + 34225 = 482^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 266549 - 2⁸ = 266293 is a prime.

It is a Chen prime.

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 266549.

It is not a weakly prime, because it can be changed into another prime (266599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133274 + 133275.

It is an arithmetic number, because the mean of its divisors is an integer number (133275).

2²⁶⁶⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

266549 is a deficient number, since it is larger than the sum of its proper divisors (1).

266549 is an equidigital number, since it uses as much as digits as its factorization.

266549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 266549 is about 516.2838366635. The cubic root of 266549 is about 64.3564904211.

The spelling of 266549 in words is "two hundred sixty-six thousand, five hundred forty-nine".