1065818665817 has 2 divisors, whose sum is σ = 1065818665818. Its totient is φ = 1065818665816.

The previous prime is 1065818665801. The next prime is 1065818665841. The reversal of 1065818665817 is 7185668185601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 913440859081 + 152377806736 = 955741^2 + 390356^2 .

It is an emirp because it is prime and its reverse (7185668185601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1065818665817 - 2⁴ = 1065818665801 is a prime.

It is a super-2 number, since 2×1065818665817² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1065818665817.

It is not a weakly prime, because it can be changed into another prime (1065818662817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 532909332908 + 532909332909.

It is an arithmetic number, because the mean of its divisors is an integer number (532909332909).

Almost surely, 2^{1065818665817} is an apocalyptic number.

It is an amenable number.

1065818665817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1065818665817 is an equidigital number, since it uses as much as digits as its factorization.

1065818665817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19353600, while the sum is 62.

The spelling of 1065818665817 in words is "one trillion, sixty-five billion, eight hundred eighteen million, six hundred sixty-five thousand, eight hundred seventeen".