17089781066 has 4 divisors (see below), whose sum is σ = 25634671602. Its totient is φ = 8544890532.

The previous prime is 17089780993. The next prime is 17089781083. The reversal of 17089781066 is 66018798071.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15791692225 + 1298088841 = 125665^2 + 36029^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 17089780999 and 17089781017.

It is an unprimeable number.

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, 4272445265 + ... + 4272445268.

Almost surely, 2^17089781066 is an apocalyptic number.

17089781066 is a deficient number, since it is larger than the sum of its proper divisors (8544890536).

17089781066 is an equidigital number, since it uses as much as digits as its factorization.

17089781066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8544890535.

The product of its (nonzero) digits is 1016064, while the sum is 53.

The spelling of 17089781066 in words is "seventeen billion, eighty-nine million, seven hundred eighty-one thousand, sixty-six".