99729666 has 48 divisors (see below), whose sum is σ = 230780160. Its totient is φ = 31056480.

The previous prime is 99729649. The next prime is 99729673. The reversal of 99729666 is 66692799.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13101 + ... + 19263.

It is an arithmetic number, because the mean of its divisors is an integer number (4807920).

Almost surely, 2^99729666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99729666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115390080).

99729666 is an abundant number, since it is smaller than the sum of its proper divisors (131050494).

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

99729666 is a wasteful number, since it uses less digits than its factorization.

99729666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6231 (or 6228 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 99729666 is about 9986.4741525726. The cubic root of 99729666 is about 463.7402461362.

The spelling of 99729666 in words is "ninety-nine million, seven hundred twenty-nine thousand, six hundred sixty-six".