9817866673 has 6 divisors (see below), whose sum is σ = 10429360406. Its totient is φ = 9240344832.

The previous prime is 9817866671. The next prime is 9817866677. The reversal of 9817866673 is 3766687189.

It can be written as a sum of positive squares in 3 ways, for example, as 3298434624 + 6519432049 = 57432^2 + 80743^2 .

It is not a de Polignac number, because 9817866673 - 2¹ = 9817866671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9817866671) 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 in 5 ways as a sum of consecutive naturals, for example, 16985640 + ... + 16986217.

Almost surely, 2^9817866673 is an apocalyptic number.

It is an amenable number.

9817866673 is a deficient number, since it is larger than the sum of its proper divisors (611493733).

9817866673 is a wasteful number, since it uses less digits than its factorization.

9817866673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33971891 (or 33971874 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 61.

The square root of 9817866673 is about 99085.1485995757. The cubic root of 9817866673 is about 2141.2746557233.

The spelling of 9817866673 in words is "nine billion, eight hundred seventeen million, eight hundred sixty-six thousand, six hundred seventy-three".