266408869 has 2 divisors, whose sum is σ = 266408870. Its totient is φ = 266408868.

The previous prime is 266408867. The next prime is 266408873. The reversal of 266408869 is 968804662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 204204100 + 62204769 = 14290^2 + 7887^2 .

It is a cyclic number.

It is not a de Polignac number, because 266408869 - 2¹ = 266408867 is a prime.

It is a super-2 number, since 2×266408869² = 141947370963718322, which contains 22 as substring.

Together with 266408867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266408867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133204434 + 133204435.

It is an arithmetic number, because the mean of its divisors is an integer number (133204435).

Almost surely, 2^266408869 is an apocalyptic number.

It is an amenable number.

266408869 is a deficient number, since it is larger than the sum of its proper divisors (1).

266408869 is an equidigital number, since it uses as much as digits as its factorization.

266408869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 49.

The square root of 266408869 is about 16322.0363006581. The cubic root of 266408869 is about 643.4521054361.

The spelling of 266408869 in words is "two hundred sixty-six million, four hundred eight thousand, eight hundred sixty-nine".