99969664 has 32 divisors (see below), whose sum is σ = 199710900. Its totient is φ = 49846272.

The previous prime is 99969647. The next prime is 99969679. The reversal of 99969664 is 46696999.

It can be written as a sum of positive squares in 2 ways, for example, as 99840064 + 129600 = 9992^2 + 360^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 99969599 and 99969608.

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 3 ways as a sum of consecutive naturals, for example, 57642 + ... + 59350.

Almost surely, 2^99969664 is an apocalyptic number.

It is an amenable number.

99969664 is a deficient number, since it is larger than the sum of its proper divisors (99741236).

99969664 is a wasteful number, since it uses less digits than its factorization.

99969664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180 (or 2168 counting only the distinct ones).

The product of its digits is 5668704, while the sum is 58.

The square root of 99969664 is about 9998.4830849484. The cubic root of 99969664 is about 464.1119428680. Note that the first 3 decimals are identical.

The spelling of 99969664 in words is "ninety-nine million, nine hundred sixty-nine thousand, six hundred sixty-four".