6814571666 has 16 divisors (see below), whose sum is σ = 11719693440. Its totient is φ = 2911138080.

The previous prime is 6814571657. The next prime is 6814571717. The reversal of 6814571666 is 6661754186.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 778211 + ... + 786918.

It is an arithmetic number, because the mean of its divisors is an integer number (732480840).

Almost surely, 2^6814571666 is an apocalyptic number.

6814571666 is a deficient number, since it is larger than the sum of its proper divisors (4905121774).

6814571666 is a wasteful number, since it uses less digits than its factorization.

6814571666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565449.

The product of its digits is 1451520, while the sum is 50.

The square root of 6814571666 is about 82550.4189329164. The cubic root of 6814571666 is about 1895.8887712779. Note that the first 3 decimals are identical.

The spelling of 6814571666 in words is "six billion, eight hundred fourteen million, five hundred seventy-one thousand, six hundred sixty-six".