6786205778 has 16 divisors (see below), whose sum is σ = 11106815904. Its totient is φ = 3084051360.

The previous prime is 6786205771. The next prime is 6786205793. The reversal of 6786205778 is 8775026876.

It is a happy number.

6786205778 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×6786205778² = 92105177722721170568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6786205771) 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, 101726 + ... + 154662.

It is an arithmetic number, because the mean of its divisors is an integer number (694175994).

Almost surely, 2^6786205778 is an apocalyptic number.

6786205778 is a deficient number, since it is larger than the sum of its proper divisors (4320610126).

6786205778 is a wasteful number, since it uses less digits than its factorization.

6786205778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58777.

The product of its (nonzero) digits is 7902720, while the sum is 56.

The square root of 6786205778 is about 82378.4302958001. The cubic root of 6786205778 is about 1893.2545455530.

The spelling of 6786205778 in words is "six billion, seven hundred eighty-six million, two hundred five thousand, seven hundred seventy-eight".