17066189821 has 2 divisors, whose sum is σ = 17066189822. Its totient is φ = 17066189820.

The previous prime is 17066189759. The next prime is 17066189827. The reversal of 17066189821 is 12898166071.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9122924196 + 7943265625 = 95514^2 + 89125^2 .

It is a cyclic number.

It is not a de Polignac number, because 17066189821 - 2¹⁷ = 17066058749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17066189827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8533094910 + 8533094911.

It is an arithmetic number, because the mean of its divisors is an integer number (8533094911).

Almost surely, 2^17066189821 is an apocalyptic number.

It is an amenable number.

17066189821 is a deficient number, since it is larger than the sum of its proper divisors (1).

17066189821 is an equidigital number, since it uses as much as digits as its factorization.

17066189821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 49.

The spelling of 17066189821 in words is "seventeen billion, sixty-six million, one hundred eighty-nine thousand, eight hundred twenty-one".