99866898 has 64 divisors (see below), whose sum is σ = 232848000. Its totient is φ = 31691520.

The previous prime is 99866873. The next prime is 99866909. The reversal of 99866898 is 89866899.

It is a super-2 number, since 2×99866898² = 19946794632284808, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94678 + ... + 95726.

It is an arithmetic number, because the mean of its divisors is an integer number (3638250).

Almost surely, 2^99866898 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99866898, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116424000).

99866898 is an abundant number, since it is smaller than the sum of its proper divisors (132981102).

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

99866898 is a wasteful number, since it uses less digits than its factorization.

99866898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144 (or 1138 counting only the distinct ones).

The product of its digits is 13436928, while the sum is 63.

The square root of 99866898 is about 9993.3426840072. The cubic root of 99866898 is about 463.9528570068.

Subtracting from 99866898 its reverse (89866899), we obtain a palindrome (9999999).

It can be divided in two parts, 998 and 66898, that added together give a triangular number (67896 = T₃₆₈).

The spelling of 99866898 in words is "ninety-nine million, eight hundred sixty-six thousand, eight hundred ninety-eight".