6855716777 has 16 divisors (see below), whose sum is σ = 8563750272. Its totient is φ = 5343338880.

The previous prime is 6855716773. The next prime is 6855716809. The reversal of 6855716777 is 7776175586.

It is a happy number.

6855716777 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 6855716777 - 2² = 6855716773 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6855716773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 556124 + ... + 568317.

It is an arithmetic number, because the mean of its divisors is an integer number (535234392).

Almost surely, 2^6855716777 is an apocalyptic number.

6855716777 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

6855716777 is a deficient number, since it is larger than the sum of its proper divisors (1708033495).

6855716777 is a wasteful number, since it uses less digits than its factorization.

6855716777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124528.

The product of its digits is 17287200, while the sum is 59.

The square root of 6855716777 is about 82799.2558964149. The cubic root of 6855716777 is about 1899.6967915971.

The spelling of 6855716777 in words is "six billion, eight hundred fifty-five million, seven hundred sixteen thousand, seven hundred seventy-seven".