266340238442149 has 2 divisors, whose sum is σ = 266340238442150. Its totient is φ = 266340238442148.

The previous prime is 266340238442123. The next prime is 266340238442207. The reversal of 266340238442149 is 941244832043662.

It is an a-pointer prime, because the next prime (266340238442207) can be obtained adding 266340238442149 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 175294157616900 + 91046080825249 = 13239870^2 + 9541807^2 .

It is a cyclic number.

It is not a de Polignac number, because 266340238442149 - 2⁹ = 266340238441637 is a prime.

It is a super-2 number, since 2×266340238442149² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 266340238442093 and 266340238442102.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266340238442119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133170119221074 + 133170119221075.

It is an arithmetic number, because the mean of its divisors is an integer number (133170119221075).

Almost surely, 2^{266340238442149} is an apocalyptic number.

It is an amenable number.

266340238442149 is a deficient number, since it is larger than the sum of its proper divisors (1).

266340238442149 is an equidigital number, since it uses as much as digits as its factorization.

266340238442149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47775744, while the sum is 58.

The spelling of 266340238442149 in words is "two hundred sixty-six trillion, three hundred forty billion, two hundred thirty-eight million, four hundred forty-two thousand, one hundred forty-nine".