6851798566 has 4 divisors (see below), whose sum is σ = 10277697852. Its totient is φ = 3425899282.

The previous prime is 6851798557. The next prime is 6851798623. The reversal of 6851798566 is 6658971586.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1712949640 + ... + 1712949643.

It is an arithmetic number, because the mean of its divisors is an integer number (2569424463).

Almost surely, 2^6851798566 is an apocalyptic number.

6851798566 is a deficient number, since it is larger than the sum of its proper divisors (3425899286).

6851798566 is a wasteful number, since it uses less digits than its factorization.

6851798566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3425899285.

The product of its digits is 21772800, while the sum is 61.

The square root of 6851798566 is about 82775.5916076714. The cubic root of 6851798566 is about 1899.3348147929.

The spelling of 6851798566 in words is "six billion, eight hundred fifty-one million, seven hundred ninety-eight thousand, five hundred sixty-six".