6640628084 has 48 divisors (see below), whose sum is σ = 12023782848. Its totient is φ = 3207714048.

The previous prime is 6640628069. The next prime is 6640628089. The reversal of 6640628084 is 4808260466.

It is a super-2 number, since 2×6640628084² = 88195882700019022112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6640628089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3853247 + ... + 3854969.

It is an arithmetic number, because the mean of its divisors is an integer number (250495476).

Almost surely, 2^6640628084 is an apocalyptic number.

It is an amenable number.

6640628084 is a deficient number, since it is larger than the sum of its proper divisors (5383154764).

6640628084 is a wasteful number, since it uses less digits than its factorization.

6640628084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2064 (or 2062 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 6640628084 is about 81490.0489875911. The cubic root of 6640628084 is about 1879.6185362299.

The spelling of 6640628084 in words is "six billion, six hundred forty million, six hundred twenty-eight thousand, eighty-four".