6639779366 has 8 divisors (see below), whose sum is σ = 10865093544. Its totient is φ = 3018081520.

The previous prime is 6639779327. The next prime is 6639779371.

6639779366 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 6639779299 and 6639779308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150904055 + ... + 150904098.

It is an arithmetic number, because the mean of its divisors is an integer number (1358136693).

Almost surely, 2^6639779366 is an apocalyptic number.

6639779366 is a deficient number, since it is larger than the sum of its proper divisors (4225314178).

6639779366 is a wasteful number, since it uses less digits than its factorization.

6639779366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301808166.

The product of its digits is 46294416, while the sum is 62.

The square root of 6639779366 is about 81484.8413264700. The cubic root of 6639779366 is about 1879.5384567539.

The spelling of 6639779366 in words is "six billion, six hundred thirty-nine million, seven hundred seventy-nine thousand, three hundred sixty-six".