17066811961 has 2 divisors, whose sum is σ = 17066811962. Its totient is φ = 17066811960.

The previous prime is 17066811913. The next prime is 17066812031. The reversal of 17066811961 is 16911866071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17065503225 + 1308736 = 130635^2 + 1144^2 .

It is an emirp because it is prime and its reverse (16911866071) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17066811961 - 2⁷ = 17066811833 is a prime.

It is not a weakly prime, because it can be changed into another prime (17066811901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8533405980 + 8533405981.

It is an arithmetic number, because the mean of its divisors is an integer number (8533405981).

Almost surely, 2^17066811961 is an apocalyptic number.

It is an amenable number.

17066811961 is a deficient number, since it is larger than the sum of its proper divisors (1).

17066811961 is an equidigital number, since it uses as much as digits as its factorization.

17066811961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 46.

The spelling of 17066811961 in words is "seventeen billion, sixty-six million, eight hundred eleven thousand, nine hundred sixty-one".