8368744063661 has 2 divisors, whose sum is σ = 8368744063662. Its totient is φ = 8368744063660.

The previous prime is 8368744063649. The next prime is 8368744063681. The reversal of 8368744063661 is 1663604478638.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8284524541225 + 84219522436 = 2878285^2 + 290206^2 .

It is a cyclic number.

It is not a de Polignac number, because 8368744063661 - 2³⁰ = 8367670321837 is a prime.

It is a super-2 number, since 2×8368744063661² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8368744063594 and 8368744063603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8368744063681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4184372031830 + 4184372031831.

It is an arithmetic number, because the mean of its divisors is an integer number (4184372031831).

Almost surely, 2^{8368744063661} is an apocalyptic number.

It is an amenable number.

8368744063661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8368744063661 is an equidigital number, since it uses as much as digits as its factorization.

8368744063661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 83607552, while the sum is 62.

The spelling of 8368744063661 in words is "eight trillion, three hundred sixty-eight billion, seven hundred forty-four million, sixty-three thousand, six hundred sixty-one".