9998658776 has 16 divisors (see below), whose sum is σ = 18748584240. Its totient is φ = 4999036320.

The previous prime is 9998658751. The next prime is 9998658793. The reversal of 9998658776 is 6778568999.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193130 + ... + 239366.

It is an arithmetic number, because the mean of its divisors is an integer number (1171786515).

Almost surely, 2^9998658776 is an apocalyptic number.

It is an amenable number.

9998658776 is a deficient number, since it is larger than the sum of its proper divisors (8749925464).

9998658776 is a wasteful number, since it uses less digits than its factorization.

9998658776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73274 (or 73270 counting only the distinct ones).

The product of its digits is 411505920, while the sum is 74.

The square root of 9998658776 is about 99993.2936551247. The cubic root of 9998658776 is about 2154.3383664083.

The spelling of 9998658776 in words is "nine billion, nine hundred ninety-eight million, six hundred fifty-eight thousand, seven hundred seventy-six".