6640004120 has 32 divisors (see below), whose sum is σ = 15304403520. Its totient is φ = 2591220480.

The previous prime is 6640004099. The next prime is 6640004131. The reversal of 6640004120 is 214000466.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2022752 + ... + 2026031.

It is an arithmetic number, because the mean of its divisors is an integer number (478262610).

Almost surely, 2^6640004120 is an apocalyptic number.

It is an amenable number.

6640004120 is an abundant number, since it is smaller than the sum of its proper divisors (8664399400).

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

6640004120 is a wasteful number, since it uses less digits than its factorization.

6640004120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4048835 (or 4048831 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 6640004120 is about 81486.2204302053. The cubic root of 6640004120 is about 1879.5596637347.

Adding to 6640004120 its reverse (214000466), we get a palindrome (6854004586).

The spelling of 6640004120 in words is "six billion, six hundred forty million, four thousand, one hundred twenty".