266904563 has 2 divisors, whose sum is σ = 266904564. Its totient is φ = 266904562.

The previous prime is 266904527. The next prime is 266904593. The reversal of 266904563 is 365409662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266904563 - 2⁶ = 266904499 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266904563.

It is not a weakly prime, because it can be changed into another prime (266904593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133452281 + 133452282.

It is an arithmetic number, because the mean of its divisors is an integer number (133452282).

Almost surely, 2^266904563 is an apocalyptic number.

266904563 is a deficient number, since it is larger than the sum of its proper divisors (1).

266904563 is an equidigital number, since it uses as much as digits as its factorization.

266904563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 266904563 is about 16337.2140525856. The cubic root of 266904563 is about 643.8509381674.

The spelling of 266904563 in words is "two hundred sixty-six million, nine hundred four thousand, five hundred sixty-three".