999664488 has 24 divisors (see below), whose sum is σ = 2707424850. Its totient is φ = 333221472.

The previous prime is 999664427. The next prime is 999664507. The reversal of 999664488 is 884466999.

999664488 is a `hidden beast` number, since 9 + 9 + 96 + 64 + 488 = 666.

It can be written as a sum of positive squares in only one way, i.e., 837407844 + 162256644 = 28938^2 + 12738^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6942043 + ... + 6942186.

Almost surely, 2^999664488 is an apocalyptic number.

It is an amenable number.

999664488 is an abundant number, since it is smaller than the sum of its proper divisors (1707760362).

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

999664488 is a wasteful number, since it uses less digits than its factorization.

999664488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13884241 (or 13884234 counting only the distinct ones).

The product of its digits is 26873856, while the sum is 63.

The square root of 999664488 is about 31617.4712461323. The cubic root of 999664488 is about 999.8881501567. Note that the first 3 decimals are identical.

The spelling of 999664488 in words is "nine hundred ninety-nine million, six hundred sixty-four thousand, four hundred eighty-eight".