6777791 has 4 divisors (see below), whose sum is σ = 6783000. Its totient is φ = 6772584.

The previous prime is 6777769. The next prime is 6777803. The reversal of 6777791 is 1977776.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6777791 - 2¹⁴ = 6761407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6777191) 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, 1220 + ... + 3878.

It is an arithmetic number, because the mean of its divisors is an integer number (1695750).

Almost surely, 2^6777791 is an apocalyptic number.

6777791 is a deficient number, since it is larger than the sum of its proper divisors (5209).

6777791 is a wasteful number, since it uses less digits than its factorization.

6777791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5208.

The product of its digits is 129654, while the sum is 44.

The square root of 6777791 is about 2603.4190980324. The cubic root of 6777791 is about 189.2471687571.

The spelling of 6777791 in words is "six million, seven hundred seventy-seven thousand, seven hundred ninety-one".