266863 has 2 divisors, whose sum is σ = 266864. Its totient is φ = 266862.

The previous prime is 266839. The next prime is 266867. The reversal of 266863 is 368662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266863 - 2⁹ = 266351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133431 + 133432.

It is an arithmetic number, because the mean of its divisors is an integer number (133432).

2²⁶⁶⁸⁶³ is an apocalyptic number.

266863 is a deficient number, since it is larger than the sum of its proper divisors (1).

266863 is an equidigital number, since it uses as much as digits as its factorization.

266863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 31.

The square root of 266863 is about 516.5878434497. The cubic root of 266863 is about 64.3817515777.

It can be divided in two parts, 26 and 6863, that added together give a square (6889 = 83²).

The spelling of 266863 in words is "two hundred sixty-six thousand, eight hundred sixty-three".