266587 has 2 divisors, whose sum is σ = 266588. Its totient is φ = 266586.

The previous prime is 266549. The next prime is 266599. The reversal of 266587 is 785662.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266587 is a prime.

It is not a weakly prime, because it can be changed into another prime (266687) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133293 + 133294.

It is an arithmetic number, because the mean of its divisors is an integer number (133294).

2²⁶⁶⁵⁸⁷ is an apocalyptic number.

266587 is a deficient number, since it is larger than the sum of its proper divisors (1).

266587 is an equidigital number, since it uses as much as digits as its factorization.

266587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 34.

The square root of 266587 is about 516.3206368140. The cubic root of 266587 is about 64.3595485585.

The spelling of 266587 in words is "two hundred sixty-six thousand, five hundred eighty-seven".