266242547 has 2 divisors, whose sum is σ = 266242548. Its totient is φ = 266242546.

The previous prime is 266242531. The next prime is 266242567. The reversal of 266242547 is 745242662.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 266242547 - 2⁴ = 266242531 is a prime.

It is a super-3 number, since 3×266242547³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 266242547.

It is not a weakly prime, because it can be changed into another prime (266242517) 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, 133121273 + 133121274.

It is an arithmetic number, because the mean of its divisors is an integer number (133121274).

Almost surely, 2^266242547 is an apocalyptic number.

266242547 is a deficient number, since it is larger than the sum of its proper divisors (1).

266242547 is an equidigital number, since it uses as much as digits as its factorization.

266242547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 38.

The square root of 266242547 is about 16316.9404914034. The cubic root of 266242547 is about 643.3181728077.

The spelling of 266242547 in words is "two hundred sixty-six million, two hundred forty-two thousand, five hundred forty-seven".