99866199 has 4 divisors (see below), whose sum is σ = 133154936. Its totient is φ = 66577464.

The previous prime is 99866197. The next prime is 99866209. The reversal of 99866199 is 99166899.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 99866199 - 2¹ = 99866197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99866197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16644364 + ... + 16644369.

It is an arithmetic number, because the mean of its divisors is an integer number (33288734).

Almost surely, 2^99866199 is an apocalyptic number.

99866199 is a deficient number, since it is larger than the sum of its proper divisors (33288737).

99866199 is a wasteful number, since it uses less digits than its factorization.

99866199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33288736.

The product of its digits is 1889568, while the sum is 57.

The square root of 99866199 is about 9993.3077106632. The cubic root of 99866199 is about 463.9517745534.

The spelling of 99866199 in words is "ninety-nine million, eight hundred sixty-six thousand, one hundred ninety-nine".