266155199 has 2 divisors, whose sum is σ = 266155200. Its totient is φ = 266155198.

The previous prime is 266155177. The next prime is 266155207. The reversal of 266155199 is 991551662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 266155199 - 2¹² = 266151103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266155159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133077599 + 133077600.

It is an arithmetic number, because the mean of its divisors is an integer number (133077600).

Almost surely, 2^266155199 is an apocalyptic number.

266155199 is a deficient number, since it is larger than the sum of its proper divisors (1).

266155199 is an equidigital number, since it uses as much as digits as its factorization.

266155199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145800, while the sum is 44.

The square root of 266155199 is about 16314.2636671104. The cubic root of 266155199 is about 643.2478125257.

The spelling of 266155199 in words is "two hundred sixty-six million, one hundred fifty-five thousand, one hundred ninety-nine".