266012081 has 2 divisors, whose sum is σ = 266012082. Its totient is φ = 266012080.

The previous prime is 266012051. The next prime is 266012111. The reversal of 266012081 is 180210662.

It is a balanced prime because it is at equal distance from previous prime (266012051) and next prime (266012111).

It can be written as a sum of positive squares in only one way, i.e., 258695056 + 7317025 = 16084^2 + 2705^2 .

It is a cyclic number.

It is not a de Polignac number, because 266012081 - 2¹⁸ = 265749937 is a prime.

It is a super-2 number, since 2×266012081² = 141524854475901122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 266012081.

It is not a weakly prime, because it can be changed into another prime (266012051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133006040 + 133006041.

It is an arithmetic number, because the mean of its divisors is an integer number (133006041).

Almost surely, 2^266012081 is an apocalyptic number.

It is an amenable number.

266012081 is a deficient number, since it is larger than the sum of its proper divisors (1).

266012081 is an equidigital number, since it uses as much as digits as its factorization.

266012081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 266012081 is about 16309.8767929129. The cubic root of 266012081 is about 643.1324952889.

It can be divided in two parts, 26601 and 2081, that added together give a palindrome (28682).

The spelling of 266012081 in words is "two hundred sixty-six million, twelve thousand, eighty-one".