99789066 has 48 divisors (see below), whose sum is σ = 233906400. Its totient is φ = 30564000.

The previous prime is 99789023. The next prime is 99789071. The reversal of 99789066 is 66098799.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57885 + ... + 59583.

It is an arithmetic number, because the mean of its divisors is an integer number (4873050).

Almost surely, 2^99789066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99789066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116953200).

99789066 is an abundant number, since it is smaller than the sum of its proper divisors (134117334).

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

99789066 is a wasteful number, since it uses less digits than its factorization.

99789066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971 (or 1968 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The square root of 99789066 is about 9989.4477324825. The cubic root of 99789066 is about 463.8322973269.

It can be divided in two parts, 9978 and 9066, that added together give a square (19044 = 138²).

The spelling of 99789066 in words is "ninety-nine million, seven hundred eighty-nine thousand, sixty-six".