99644664 has 192 divisors, whose sum is σ = 316016640. Its totient is φ = 25608960.

The previous prime is 99644647. The next prime is 99644707. The reversal of 99644664 is 46644699.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1880062 + ... + 1880114.

It is an arithmetic number, because the mean of its divisors is an integer number (1645920).

Almost surely, 2^99644664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99644664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158008320).

99644664 is an abundant number, since it is smaller than the sum of its proper divisors (216371976).

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

99644664 is a wasteful number, since it uses less digits than its factorization.

99644664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 115 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 48.

The square root of 99644664 is about 9982.2173889372. The cubic root of 99644664 is about 463.6084563539.

The spelling of 99644664 in words is "ninety-nine million, six hundred forty-four thousand, six hundred sixty-four".