99906 has 8 divisors (see below), whose sum is σ = 199824. Its totient is φ = 33300.

The previous prime is 99901. The next prime is 99907. The reversal of 99906 is 60999.

99906 is nontrivially palindromic in base 5.

It is a sphenic number, since it is the product of 3 distinct primes.

99906 is an admirable number.

It is a Curzon number.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (99901) 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, 8320 + ... + 8331.

It is an arithmetic number, because the mean of its divisors is an integer number (24978).

2⁹⁹⁹⁰⁶ is an apocalyptic number.

99906 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99912).

99906 is a wasteful number, since it uses less digits than its factorization.

99906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16656.

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 99906 is about 316.0791040230. The cubic root of 99906 is about 46.4013401317.

The spelling of 99906 in words is "ninety-nine thousand, nine hundred six".