1366484872217 has 2 divisors, whose sum is σ = 1366484872218. Its totient is φ = 1366484872216.

The previous prime is 1366484872187. The next prime is 1366484872229. The reversal of 1366484872217 is 7122784846631.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1116088715401 + 250396156816 = 1056451^2 + 500396^2 .

It is a cyclic number.

It is not a de Polignac number, because 1366484872217 - 2²⁴ = 1366468095001 is a prime.

It is a super-3 number, since 3×1366484872217³ (a number of 37 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1366484892217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683242436108 + 683242436109.

It is an arithmetic number, because the mean of its divisors is an integer number (683242436109).

Almost surely, 2^{1366484872217} is an apocalyptic number.

It is an amenable number.

1366484872217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366484872217 is an equidigital number, since it uses as much as digits as its factorization.

1366484872217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21676032, while the sum is 59.

The spelling of 1366484872217 in words is "one trillion, three hundred sixty-six billion, four hundred eighty-four million, eight hundred seventy-two thousand, two hundred seventeen".