99660000 has 240 divisors, whose sum is σ = 358985088. Its totient is φ = 24000000.

The previous prime is 99659983. The next prime is 99660013. The reversal of 99660000 is 6699.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 99660000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 659925 + ... + 660075.

Almost surely, 2^99660000 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 99660000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179492544).

99660000 is an abundant number, since it is smaller than the sum of its proper divisors (259325088).

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

99660000 is a wasteful number, since it uses less digits than its factorization.

99660000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 99660000 is about 9982.9855253827. The cubic root of 99660000 is about 463.6322393118.

Adding to 99660000 its reverse (6699), we get a palindrome (99666699).

The spelling of 99660000 in words is "ninety-nine million, six hundred sixty thousand".