266058770821061 has 2 divisors, whose sum is σ = 266058770821062. Its totient is φ = 266058770821060.

The previous prime is 266058770821057. The next prime is 266058770821159. The reversal of 266058770821061 is 160128077850662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237049440888100 + 29009329932961 = 15396410^2 + 5386031^2 .

It is a cyclic number.

It is not a de Polignac number, because 266058770821061 - 2² = 266058770821057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266058770826061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133029385410530 + 133029385410531.

It is an arithmetic number, because the mean of its divisors is an integer number (133029385410531).

Almost surely, 2^{266058770821061} is an apocalyptic number.

It is an amenable number.

266058770821061 is a deficient number, since it is larger than the sum of its proper divisors (1).

266058770821061 is an equidigital number, since it uses as much as digits as its factorization.

266058770821061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13547520, while the sum is 59.

The spelling of 266058770821061 in words is "two hundred sixty-six trillion, fifty-eight billion, seven hundred seventy million, eight hundred twenty-one thousand, sixty-one".