99998668 has 48 divisors (see below), whose sum is σ = 219744000. Its totient is φ = 38681280.

The previous prime is 99998663. The next prime is 99998749. The reversal of 99998668 is 86689999.

It is not an unprimeable number, because it can be changed into a prime (99998663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44803 + ... + 46981.

It is an arithmetic number, because the mean of its divisors is an integer number (4578000).

Almost surely, 2^99998668 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99998668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109872000).

99998668 is an abundant number, since it is smaller than the sum of its proper divisors (119745332).

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

99998668 is a wasteful number, since it uses less digits than its factorization.

99998668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350 (or 2348 counting only the distinct ones).

The product of its digits is 15116544, while the sum is 64.

The square root of 99998668 is about 9999.9333997782. The cubic root of 99998668 is about 464.1568224867.

The spelling of 99998668 in words is "ninety-nine million, nine hundred ninety-eight thousand, six hundred sixty-eight".