6668500005 has 24 divisors (see below), whose sum is σ = 11568174072. Its totient is φ = 3553628544.

The previous prime is 6668500001. The next prime is 6668500021. The reversal of 6668500005 is 5000058666.

It can be written as a sum of positive squares in 4 ways, for example, as 3580586244 + 3087913761 = 59838^2 + 55569^2 .

It is not a de Polignac number, because 6668500005 - 2² = 6668500001 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6668500001) 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 in 23 ways as a sum of consecutive naturals, for example, 4234 + ... + 115563.

It is an arithmetic number, because the mean of its divisors is an integer number (482007253).

Almost surely, 2^6668500005 is an apocalyptic number.

It is an amenable number.

6668500005 is a deficient number, since it is larger than the sum of its proper divisors (4899674067).

6668500005 is a wasteful number, since it uses less digits than its factorization.

6668500005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121045 (or 121042 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 6668500005 is about 81660.8841796365. The cubic root of 6668500005 is about 1882.2445656922.

The spelling of 6668500005 in words is "six billion, six hundred sixty-eight million, five hundred thousand, five".