6816666730 has 8 divisors (see below), whose sum is σ = 12270000132. Its totient is φ = 2726666688.

The previous prime is 6816666721. The next prime is 6816666751. The reversal of 6816666730 is 376666186.

It can be written as a sum of positive squares in 2 ways, for example, as 5954128569 + 862538161 = 77163^2 + 29369^2 .

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

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, 340833327 + ... + 340833346.

Almost surely, 2^6816666730 is an apocalyptic number.

6816666730 is a deficient number, since it is larger than the sum of its proper divisors (5453333402).

6816666730 is a wasteful number, since it uses less digits than its factorization.

6816666730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681666680.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The square root of 6816666730 is about 82563.1075602172. The cubic root of 6816666730 is about 1896.0830413180.

The spelling of 6816666730 in words is "six billion, eight hundred sixteen million, six hundred sixty-six thousand, seven hundred thirty".