99660100 has 18 divisors (see below), whose sum is σ = 216262634. Its totient is φ = 39864000.

The previous prime is 99660097. The next prime is 99660109. The reversal of 99660100 is 106699.

It can be written as a sum of positive squares in 3 ways, for example, as 617796 + 99042304 = 786^2 + 9952^2 .

It is not an unprimeable number, because it can be changed into a prime (99660109) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 498201 + ... + 498400.

Almost surely, 2^99660100 is an apocalyptic number.

It is an amenable number.

99660100 is an abundant number, since it is smaller than the sum of its proper divisors (116602534).

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

99660100 is a wasteful number, since it uses less digits than its factorization.

99660100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996615 (or 996608 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 99660100 is about 9982.9905339032. The cubic root of 99660100 is about 463.6323943831.

Adding to 99660100 its reverse (106699), we get a palindrome (99766799).

The spelling of 99660100 in words is "ninety-nine million, six hundred sixty thousand, one hundred".