19660095617 has 2 divisors, whose sum is σ = 19660095618. Its totient is φ = 19660095616.

The previous prime is 19660095613. The next prime is 19660095649. The reversal of 19660095617 is 71659006691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12442063936 + 7218031681 = 111544^2 + 84959^2 .

It is a cyclic number.

It is not a de Polignac number, because 19660095617 - 2² = 19660095613 is a prime.

It is a super-2 number, since 2×19660095617² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19660095613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9830047808 + 9830047809.

It is an arithmetic number, because the mean of its divisors is an integer number (9830047809).

Almost surely, 2^19660095617 is an apocalyptic number.

It is an amenable number.

19660095617 is a deficient number, since it is larger than the sum of its proper divisors (1).

19660095617 is an equidigital number, since it uses as much as digits as its factorization.

19660095617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 50.

The spelling of 19660095617 in words is "nineteen billion, six hundred sixty million, ninety-five thousand, six hundred seventeen".