6665888000 has 72 divisors (see below), whose sum is σ = 16605639960. Its totient is φ = 2666342400.

The previous prime is 6665887997. The next prime is 6665888011. The reversal of 6665888000 is 8885666.

It can be written as a sum of positive squares in 4 ways, for example, as 173396224 + 6492491776 = 13168^2 + 80576^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72155 + ... + 136154.

Almost surely, 2^6665888000 is an apocalyptic number.

It is an amenable number.

6665888000 is an abundant number, since it is smaller than the sum of its proper divisors (9939751960).

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

6665888000 is an equidigital number, since it uses as much as digits as its factorization.

6665888000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208340 (or 208316 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 47.

The square root of 6665888000 is about 81644.8896134963. The cubic root of 6665888000 is about 1881.9987795702.

The spelling of 6665888000 in words is "six billion, six hundred sixty-five million, eight hundred eighty-eight thousand".