6659779616 has 48 divisors (see below), whose sum is σ = 14993548416. Its totient is φ = 2852468736.

The previous prime is 6659779579. The next prime is 6659779627. The reversal of 6659779616 is 6169779566.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405680 + ... + 421776.

It is an arithmetic number, because the mean of its divisors is an integer number (312365592).

Almost surely, 2^6659779616 is an apocalyptic number.

It is an amenable number.

6659779616 is an abundant number, since it is smaller than the sum of its proper divisors (8333768800).

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

6659779616 is a wasteful number, since it uses less digits than its factorization.

6659779616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17961 (or 17953 counting only the distinct ones).

The product of its digits is 25719120, while the sum is 62.

The square root of 6659779616 is about 81607.4727950817. The cubic root of 6659779616 is about 1881.4237381793.

The spelling of 6659779616 in words is "six billion, six hundred fifty-nine million, seven hundred seventy-nine thousand, six hundred sixteen".