266955681 has 16 divisors (see below), whose sum is σ = 375459840. Its totient is φ = 168250320.

The previous prime is 266955677. The next prime is 266955683. The reversal of 266955681 is 186559662.

It is not a de Polignac number, because 266955681 - 2² = 266955677 is a prime.

It is a super-2 number, since 2×266955681² = 142530671236347522, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 266955681.

It is not an unprimeable number, because it can be changed into a prime (266955683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24016 + ... + 33326.

It is an arithmetic number, because the mean of its divisors is an integer number (23466240).

Almost surely, 2^266955681 is an apocalyptic number.

It is an amenable number.

266955681 is a deficient number, since it is larger than the sum of its proper divisors (108504159).

266955681 is a wasteful number, since it uses less digits than its factorization.

266955681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9836.

The product of its digits is 777600, while the sum is 48.

The square root of 266955681 is about 16338.7784427111. The cubic root of 266955681 is about 643.8920393397.

The spelling of 266955681 in words is "two hundred sixty-six million, nine hundred fifty-five thousand, six hundred eighty-one".