9866898218 has 16 divisors (see below), whose sum is σ = 14940717000. Its totient is φ = 4886687232.

The previous prime is 9866898203. The next prime is 9866898221. The reversal of 9866898218 is 8128986689.

It can be written as a sum of positive squares in 4 ways, for example, as 9200070889 + 666827329 = 95917^2 + 25823^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1131218 + ... + 1139906.

Almost surely, 2^9866898218 is an apocalyptic number.

9866898218 is a deficient number, since it is larger than the sum of its proper divisors (5073818782).

9866898218 is a wasteful number, since it uses less digits than its factorization.

9866898218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14009.

The product of its digits is 23887872, while the sum is 65.

The square root of 9866898218 is about 99332.2617179333. The cubic root of 9866898218 is about 2144.8333280261.

The spelling of 9866898218 in words is "nine billion, eight hundred sixty-six million, eight hundred ninety-eight thousand, two hundred eighteen".