6639559366 has 32 divisors (see below), whose sum is σ = 10974266496. Its totient is φ = 2987712000.

The previous prime is 6639559357. The next prime is 6639559397.

6639559366 is nontrivially palindromic in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 6639559366.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 892201 + ... + 899611.

It is an arithmetic number, because the mean of its divisors is an integer number (342945828).

Almost surely, 2^6639559366 is an apocalyptic number.

6639559366 is a deficient number, since it is larger than the sum of its proper divisors (4334707130).

6639559366 is a wasteful number, since it uses less digits than its factorization.

6639559366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7828.

The product of its digits is 23619600, while the sum is 58.

The square root of 6639559366 is about 81483.4913709519. The cubic root of 6639559366 is about 1879.5176978800.

The spelling of 6639559366 in words is "six billion, six hundred thirty-nine million, five hundred fifty-nine thousand, three hundred sixty-six".