266808881 has 2 divisors, whose sum is σ = 266808882. Its totient is φ = 266808880.

The previous prime is 266808859. The next prime is 266808911. The reversal of 266808881 is 188808662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209670400 + 57138481 = 14480^2 + 7559^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266808881 is a prime.

It is a super-2 number, since 2×266808881² = 142373957960944322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (266808181) 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 as a sum of consecutive naturals, namely, 133404440 + 133404441.

It is an arithmetic number, because the mean of its divisors is an integer number (133404441).

Almost surely, 2^266808881 is an apocalyptic number.

It is an amenable number.

266808881 is a deficient number, since it is larger than the sum of its proper divisors (1).

266808881 is an equidigital number, since it uses as much as digits as its factorization.

266808881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 294912, while the sum is 47.

The square root of 266808881 is about 16334.2854450386. The cubic root of 266808881 is about 643.7739914269.

The spelling of 266808881 in words is "two hundred sixty-six million, eight hundred eight thousand, eight hundred eighty-one".