266134217 has 2 divisors, whose sum is σ = 266134218. Its totient is φ = 266134216.

The previous prime is 266134177. The next prime is 266134223. The reversal of 266134217 is 712431662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256672441 + 9461776 = 16021^2 + 3076^2 .

It is a cyclic number.

It is not a de Polignac number, because 266134217 - 2⁶ = 266134153 is a prime.

It is not a weakly prime, because it can be changed into another prime (266134237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133067108 + 133067109.

It is an arithmetic number, because the mean of its divisors is an integer number (133067109).

Almost surely, 2^266134217 is an apocalyptic number.

It is an amenable number.

266134217 is a deficient number, since it is larger than the sum of its proper divisors (1).

266134217 is an equidigital number, since it uses as much as digits as its factorization.

266134217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 266134217 is about 16313.6205975252. The cubic root of 266134217 is about 643.2309088791.

Adding to 266134217 its reverse (712431662), we get a palindrome (978565879).

The spelling of 266134217 in words is "two hundred sixty-six million, one hundred thirty-four thousand, two hundred seventeen".