266341021 has 2 divisors, whose sum is σ = 266341022. Its totient is φ = 266341020.

The previous prime is 266341001. The next prime is 266341027. The reversal of 266341021 is 120143662.

266341021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255648121 + 10692900 = 15989^2 + 3270^2 .

It is a cyclic number.

It is not a de Polignac number, because 266341021 - 2⁹ = 266340509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266341027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133170510 + 133170511.

It is an arithmetic number, because the mean of its divisors is an integer number (133170511).

Almost surely, 2^266341021 is an apocalyptic number.

It is an amenable number.

266341021 is a deficient number, since it is larger than the sum of its proper divisors (1).

266341021 is an equidigital number, since it uses as much as digits as its factorization.

266341021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 266341021 is about 16319.9577511708. The cubic root of 266341021 is about 643.3974768179.

Adding to 266341021 its reverse (120143662), we get a palindrome (386484683).

The spelling of 266341021 in words is "two hundred sixty-six million, three hundred forty-one thousand, twenty-one".