68283340777 has 2 divisors, whose sum is σ = 68283340778. Its totient is φ = 68283340776.

The previous prime is 68283340687. The next prime is 68283340787. The reversal of 68283340777 is 77704338286.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50342345641 + 17940995136 = 224371^2 + 133944^2 .

It is a cyclic number.

It is not a de Polignac number, because 68283340777 - 2¹¹ = 68283338729 is a prime.

It is a super-2 number, since 2×68283340777² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68283340787) 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, 34141670388 + 34141670389.

It is an arithmetic number, because the mean of its divisors is an integer number (34141670389).

Almost surely, 2^68283340777 is an apocalyptic number.

It is an amenable number.

68283340777 is a deficient number, since it is larger than the sum of its proper divisors (1).

68283340777 is an equidigital number, since it uses as much as digits as its factorization.

68283340777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9483264, while the sum is 55.

It can be divided in two parts, 68283 and 340777, that added together give a triangular number (409060 = T₉₀₄).

The spelling of 68283340777 in words is "sixty-eight billion, two hundred eighty-three million, three hundred forty thousand, seven hundred seventy-seven".