6778756378889 has 8 divisors (see below), whose sum is σ = 7410978901632. Its totient is φ = 6149195846640.

The previous prime is 6778756378843. The next prime is 6778756378903. The reversal of 6778756378889 is 9888736578776.

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

It is not a de Polignac number, because 6778756378889 - 2³² = 6774461411593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6778756372889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665492294 + ... + 665502479.

It is an arithmetic number, because the mean of its divisors is an integer number (926372362704).

Almost surely, 2^{6778756378889} is an apocalyptic number.

It is an amenable number.

6778756378889 is a deficient number, since it is larger than the sum of its proper divisors (632222522743).

6778756378889 is a wasteful number, since it uses less digits than its factorization.

6778756378889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330995247.

The product of its digits is 47795650560, while the sum is 89.

The spelling of 6778756378889 in words is "six trillion, seven hundred seventy-eight billion, seven hundred fifty-six million, three hundred seventy-eight thousand, eight hundred eighty-nine".