266230691 has 2 divisors, whose sum is σ = 266230692. Its totient is φ = 266230690.

The previous prime is 266230649. The next prime is 266230703. The reversal of 266230691 is 196032662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266230691 - 2¹⁴ = 266214307 is a prime.

It is not a weakly prime, because it can be changed into another prime (266230621) 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, 133115345 + 133115346.

It is an arithmetic number, because the mean of its divisors is an integer number (133115346).

Almost surely, 2^266230691 is an apocalyptic number.

266230691 is a deficient number, since it is larger than the sum of its proper divisors (1).

266230691 is an equidigital number, since it uses as much as digits as its factorization.

266230691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 266230691 is about 16316.5771839562. The cubic root of 266230691 is about 643.3086235032.

The spelling of 266230691 in words is "two hundred sixty-six million, two hundred thirty thousand, six hundred ninety-one".