266849620899 has 16 divisors (see below), whose sum is σ = 365774651424. Its totient is φ = 172943052800.

The previous prime is 266849620847. The next prime is 266849620901. The reversal of 266849620899 is 998026948662.

266849620899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 266849620899 - 2⁷ = 266849620771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (266849620699) 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 in 15 ways as a sum of consecutive naturals, for example, 3825774 + ... + 3894899.

It is an arithmetic number, because the mean of its divisors is an integer number (22860915714).

Almost surely, 2^266849620899 is an apocalyptic number.

266849620899 is a deficient number, since it is larger than the sum of its proper divisors (98925030525).

266849620899 is a wasteful number, since it uses less digits than its factorization.

266849620899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7720998.

The product of its (nonzero) digits is 161243136, while the sum is 69.

The spelling of 266849620899 in words is "two hundred sixty-six billion, eight hundred forty-nine million, six hundred twenty thousand, eight hundred ninety-nine".