1306066366181 has 2 divisors, whose sum is σ = 1306066366182. Its totient is φ = 1306066366180.

The previous prime is 1306066366123. The next prime is 1306066366201. The reversal of 1306066366181 is 1816636606031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 946468253956 + 359598112225 = 972866^2 + 599665^2 .

It is a cyclic number.

It is not a de Polignac number, because 1306066366181 - 2¹⁸ = 1306066104037 is a prime.

It is a super-2 number, since 2×1306066366181² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1306066366481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 653033183090 + 653033183091.

It is an arithmetic number, because the mean of its divisors is an integer number (653033183091).

Almost surely, 2^{1306066366181} is an apocalyptic number.

It is an amenable number.

1306066366181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1306066366181 is an equidigital number, since it uses as much as digits as its factorization.

1306066366181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 47.

The spelling of 1306066366181 in words is "one trillion, three hundred six billion, sixty-six million, three hundred sixty-six thousand, one hundred eighty-one".