2663216656 has 20 divisors (see below), whose sum is σ = 5160858300. Its totient is φ = 1331382272.

The previous prime is 2663216641. The next prime is 2663216669. The reversal of 2663216656 is 6566123662.

It can be written as a sum of positive squares in 2 ways, for example, as 2263856400 + 399360256 = 47580^2 + 19984^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123960 + ... + 143848.

It is an arithmetic number, because the mean of its divisors is an integer number (258042915).

Almost surely, 2^2663216656 is an apocalyptic number.

It is an amenable number.

2663216656 is a deficient number, since it is larger than the sum of its proper divisors (2497641644).

2663216656 is a wasteful number, since it uses less digits than its factorization.

2663216656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28266 (or 28260 counting only the distinct ones).

The product of its digits is 466560, while the sum is 43.

The square root of 2663216656 is about 51606.3625534682. The cubic root of 2663216656 is about 1386.1242646682.

The spelling of 2663216656 in words is "two billion, six hundred sixty-three million, two hundred sixteen thousand, six hundred fifty-six".