6777861 has 16 divisors (see below), whose sum is σ = 9288000. Its totient is φ = 4395008.

The previous prime is 6777839. The next prime is 6777923. The reversal of 6777861 is 1687776.

It is a cyclic number.

It is not a de Polignac number, because 6777861 - 2⁵ = 6777829 is a prime.

6777861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6777811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26245 + ... + 26501.

It is an arithmetic number, because the mean of its divisors is an integer number (580500).

Almost surely, 2^6777861 is an apocalyptic number.

It is an amenable number.

6777861 is a deficient number, since it is larger than the sum of its proper divisors (2510139).

6777861 is a wasteful number, since it uses less digits than its factorization.

6777861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468.

The product of its digits is 98784, while the sum is 42.

The square root of 6777861 is about 2603.4325418570. The cubic root of 6777861 is about 189.2478202602.

The spelling of 6777861 in words is "six million, seven hundred seventy-seven thousand, eight hundred sixty-one".