999999986666741 has 2 divisors, whose sum is σ = 999999986666742. Its totient is φ = 999999986666740.

The previous prime is 999999986666677. The next prime is 999999986666777. The reversal of 999999986666741 is 147666689999999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 977078193062500 + 22921793604241 = 31258250^2 + 4787671^2 .

It is a cyclic number.

It is not a de Polignac number, because 999999986666741 - 2⁶ = 999999986666677 is a prime.

It is a super-2 number, since 2×999999986666741² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999999986666041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999993333370 + 499999993333371.

It is an arithmetic number, because the mean of its divisors is an integer number (499999993333371).

Almost surely, 2^{999999986666741} is an apocalyptic number.

It is an amenable number.

999999986666741 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999986666741 is an equidigital number, since it uses as much as digits as its factorization.

999999986666741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1388515032576, while the sum is 107.

The spelling of 999999986666741 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred eighty-six million, six hundred sixty-six thousand, seven hundred forty-one".