266402263 has 2 divisors, whose sum is σ = 266402264. Its totient is φ = 266402262.

The previous prime is 266402239. The next prime is 266402273. The reversal of 266402263 is 362204662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266402263 - 2⁵ = 266402231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266402273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133201131 + 133201132.

It is an arithmetic number, because the mean of its divisors is an integer number (133201132).

Almost surely, 2^266402263 is an apocalyptic number.

266402263 is a deficient number, since it is larger than the sum of its proper divisors (1).

266402263 is an equidigital number, since it uses as much as digits as its factorization.

266402263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 266402263 is about 16321.8339349474. The cubic root of 266402263 is about 643.4467869448.

The spelling of 266402263 in words is "two hundred sixty-six million, four hundred two thousand, two hundred sixty-three".