6639066660 has 48 divisors (see below), whose sum is σ = 18630864000. Its totient is φ = 1766467584.

The previous prime is 6639066653. The next prime is 6639066673. The reversal of 6639066660 is 666609366.

It is a super-2 number, since 2×6639066660² = 88154412231847111200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96280 + ... + 150159.

It is an arithmetic number, because the mean of its divisors is an integer number (388143000).

Almost surely, 2^6639066660 is an apocalyptic number.

6639066660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6639066660 is an abundant number, since it is smaller than the sum of its proper divisors (11991797340).

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

6639066660 is a wasteful number, since it uses less digits than its factorization.

6639066660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246900 (or 246898 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 48.

The square root of 6639066660 is about 81480.4679662556. The cubic root of 6639066660 is about 1879.4712052087.

The spelling of 6639066660 in words is "six billion, six hundred thirty-nine million, sixty-six thousand, six hundred sixty".