266560069 has 2 divisors, whose sum is σ = 266560070. Its totient is φ = 266560068.

The previous prime is 266560067. The next prime is 266560081. The reversal of 266560069 is 960065662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179828100 + 86731969 = 13410^2 + 9313^2 .

It is a cyclic number.

It is not a de Polignac number, because 266560069 - 2¹ = 266560067 is a prime.

It is a super-2 number, since 2×266560069² = 142108540770569522, which contains 22 as substring.

Together with 266560067, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266560067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133280034 + 133280035.

It is an arithmetic number, because the mean of its divisors is an integer number (133280035).

Almost surely, 2^266560069 is an apocalyptic number.

It is an amenable number.

266560069 is a deficient number, since it is larger than the sum of its proper divisors (1).

266560069 is an equidigital number, since it uses as much as digits as its factorization.

266560069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 266560069 is about 16326.6674186743. The cubic root of 266560069 is about 643.5738125435.

The spelling of 266560069 in words is "two hundred sixty-six million, five hundred sixty thousand, sixty-nine".