6681885608 has 8 divisors (see below), whose sum is σ = 12528535530. Its totient is φ = 3340942800.

The previous prime is 6681885601. The next prime is 6681885659. The reversal of 6681885608 is 8065881866.

It can be written as a sum of positive squares in only one way, i.e., 6681754564 + 131044 = 81742^2 + 362^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (6681885601) by changing a digit.

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 as a sum of consecutive naturals, namely, 417617843 + ... + 417617858.

Almost surely, 2^6681885608 is an apocalyptic number.

It is an amenable number.

6681885608 is a deficient number, since it is larger than the sum of its proper divisors (5846649922).

6681885608 is a wasteful number, since it uses less digits than its factorization.

6681885608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 835235707 (or 835235703 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 56.

The square root of 6681885608 is about 81742.8015668658. The cubic root of 6681885608 is about 1883.5031265579.

The spelling of 6681885608 in words is "six billion, six hundred eighty-one million, eight hundred eighty-five thousand, six hundred eight".