266278868 has 12 divisors (see below), whose sum is σ = 469658112. Its totient is φ = 132090840.

The previous prime is 266278867. The next prime is 266278877. The reversal of 266278868 is 868872662.

It is a super-2 number, since 2×266278868² = 141808871086722848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266278867) 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 3 ways as a sum of consecutive naturals, for example, 261578 + ... + 262593.

It is an arithmetic number, because the mean of its divisors is an integer number (39138176).

Almost surely, 2^266278868 is an apocalyptic number.

It is an amenable number.

266278868 is a deficient number, since it is larger than the sum of its proper divisors (203379244).

266278868 is a wasteful number, since it uses less digits than its factorization.

266278868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524302 (or 524300 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 53.

The square root of 266278868 is about 16318.0534378338. The cubic root of 266278868 is about 643.3474254537.

The spelling of 266278868 in words is "two hundred sixty-six million, two hundred seventy-eight thousand, eight hundred sixty-eight".