266655241 has 2 divisors, whose sum is σ = 266655242. Its totient is φ = 266655240.

The previous prime is 266655239. The next prime is 266655247. The reversal of 266655241 is 142556662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 263120841 + 3534400 = 16221^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 266655241 - 2¹ = 266655239 is a prime.

It is a super-2 number, since 2×266655241² = 142210035105536162, which contains 22 as substring.

Together with 266655239, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 266655241.

It is not a weakly prime, because it can be changed into another prime (266655247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133327620 + 133327621.

It is an arithmetic number, because the mean of its divisors is an integer number (133327621).

Almost surely, 2^266655241 is an apocalyptic number.

It is an amenable number.

266655241 is a deficient number, since it is larger than the sum of its proper divisors (1).

266655241 is an equidigital number, since it uses as much as digits as its factorization.

266655241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 37.

The square root of 266655241 is about 16329.5817766408. The cubic root of 266655241 is about 643.6503968059.

The spelling of 266655241 in words is "two hundred sixty-six million, six hundred fifty-five thousand, two hundred forty-one".