266099797 has 2 divisors, whose sum is σ = 266099798. Its totient is φ = 266099796.

The previous prime is 266099791. The next prime is 266099833. The reversal of 266099797 is 797990662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 266048721 + 51076 = 16311^2 + 226^2 .

It is a cyclic number.

It is not a de Polignac number, because 266099797 - 2¹⁵ = 266067029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266099791) 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, 133049898 + 133049899.

It is an arithmetic number, because the mean of its divisors is an integer number (133049899).

Almost surely, 2^266099797 is an apocalyptic number.

It is an amenable number.

266099797 is a deficient number, since it is larger than the sum of its proper divisors (1).

266099797 is an equidigital number, since it uses as much as digits as its factorization.

266099797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2571912, while the sum is 55.

The square root of 266099797 is about 16312.5656167263. The cubic root of 266099797 is about 643.2031773048.

The spelling of 266099797 in words is "two hundred sixty-six million, ninety-nine thousand, seven hundred ninety-seven".