6780871866 has 8 divisors (see below), whose sum is σ = 13561743744. Its totient is φ = 2260290620.

The previous prime is 6780871861. The next prime is 6780871873. The reversal of 6780871866 is 6681780876.

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

6780871866 is an admirable number.

It is a super-2 number, since 2×6780871866² = 91960446526220643912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6780871861) by changing a digit.

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, 565072650 + ... + 565072661.

It is an arithmetic number, because the mean of its divisors is an integer number (1695217968).

Almost surely, 2^6780871866 is an apocalyptic number.

6780871866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6780871866 is a wasteful number, since it uses less digits than its factorization.

6780871866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130145316.

The product of its (nonzero) digits is 5419008, while the sum is 57.

The square root of 6780871866 is about 82346.0494862990. The cubic root of 6780871866 is about 1892.7583871006.

The spelling of 6780871866 in words is "six billion, seven hundred eighty million, eight hundred seventy-one thousand, eight hundred sixty-six".