266808663 has 12 divisors (see below), whose sum is σ = 420425928. Its totient is φ = 161702160.

The previous prime is 266808637. The next prime is 266808683. The reversal of 266808663 is 366808662.

It is not a de Polignac number, because 266808663 - 2⁵ = 266808631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266808683) 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 11 ways as a sum of consecutive naturals, for example, 1347420 + ... + 1347617.

It is an arithmetic number, because the mean of its divisors is an integer number (35035494).

Almost surely, 2^266808663 is an apocalyptic number.

266808663 is a deficient number, since it is larger than the sum of its proper divisors (153617265).

266808663 is a wasteful number, since it uses less digits than its factorization.

266808663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2695054 (or 2695051 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The square root of 266808663 is about 16334.2787719568. The cubic root of 266808663 is about 643.7738160919.

Subtracting 266808663 from its reverse (366808662), we obtain a palindrome (99999999).

The spelling of 266808663 in words is "two hundred sixty-six million, eight hundred eight thousand, six hundred sixty-three".