266246249 has 2 divisors, whose sum is σ = 266246250. Its totient is φ = 266246248.

The previous prime is 266246219. The next prime is 266246269. The reversal of 266246249 is 942642662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 246709849 + 19536400 = 15707^2 + 4420^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266246249 is a prime.

It is not a weakly prime, because it can be changed into another prime (266246219) 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, 133123124 + 133123125.

It is an arithmetic number, because the mean of its divisors is an integer number (133123125).

Almost surely, 2^266246249 is an apocalyptic number.

It is an amenable number.

266246249 is a deficient number, since it is larger than the sum of its proper divisors (1).

266246249 is an equidigital number, since it uses as much as digits as its factorization.

266246249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 41.

The square root of 266246249 is about 16317.0539313934. The cubic root of 266246249 is about 643.3211544910.

The spelling of 266246249 in words is "two hundred sixty-six million, two hundred forty-six thousand, two hundred forty-nine".