9998909660 has 24 divisors (see below), whose sum is σ = 21023135280. Its totient is φ = 3994721024.

The previous prime is 9998909659. The next prime is 9998909689. The reversal of 9998909660 is 669098999.

It is a congruent 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, 285725 + ... + 318804.

It is an arithmetic number, because the mean of its divisors is an integer number (875963970).

Almost surely, 2^9998909660 is an apocalyptic number.

It is an amenable number.

9998909660 is an abundant number, since it is smaller than the sum of its proper divisors (11024225620).

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

9998909660 is a wasteful number, since it uses less digits than its factorization.

9998909660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605365 (or 605363 counting only the distinct ones).

The product of its (nonzero) digits is 17006112, while the sum is 65.

The square root of 9998909660 is about 99994.5481513867. The cubic root of 9998909660 is about 2154.3563849752.

The spelling of 9998909660 in words is "nine billion, nine hundred ninety-eight million, nine hundred nine thousand, six hundred sixty".