266947888899 has 16 divisors (see below), whose sum is σ = 363538685952. Its totient is φ = 174161908608.

The previous prime is 266947888861. The next prime is 266947888927. The reversal of 266947888899 is 998888749662.

266947888899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 516670²-1.

It is not a de Polignac number, because 266947888899 - 2⁷ = 266947888771 is a prime.

It is a super-2 number, since 2×266947888899² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (266947888199) 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, 1463902 + ... + 1636124.

It is an arithmetic number, because the mean of its divisors is an integer number (22721167872).

Almost surely, 2^266947888899 is an apocalyptic number.

266947888899 is a deficient number, since it is larger than the sum of its proper divisors (96590797053).

266947888899 is a wasteful number, since it uses less digits than its factorization.

266947888899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183266.

The product of its digits is 6019743744, while the sum is 84.

The spelling of 266947888899 in words is "two hundred sixty-six billion, nine hundred forty-seven million, eight hundred eighty-eight thousand, eight hundred ninety-nine".