9866198958 has 32 divisors (see below), whose sum is σ = 24601432320. Its totient is φ = 2562648960.

The previous prime is 9866198929. The next prime is 9866198963. The reversal of 9866198958 is 8598916689.

9866198958 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 9866198892 and 9866198901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10677243 + ... + 10678166.

It is an arithmetic number, because the mean of its divisors is an integer number (768794760).

Almost surely, 2^9866198958 is an apocalyptic number.

9866198958 is an abundant number, since it is smaller than the sum of its proper divisors (14735233362).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9866198958 is a wasteful number, since it uses less digits than its factorization.

9866198958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21355432.

The product of its digits is 67184640, while the sum is 69.

The square root of 9866198958 is about 99328.7418524971. The cubic root of 9866198958 is about 2144.7826592292.

The spelling of 9866198958 in words is "nine billion, eight hundred sixty-six million, one hundred ninety-eight thousand, nine hundred fifty-eight".