6778006765 has 8 divisors (see below), whose sum is σ = 8266946328. Its totient is φ = 5333513280.

The previous prime is 6778006751. The next prime is 6778006783. The reversal of 6778006765 is 5676008776.

It can be written as a sum of positive squares in 4 ways, for example, as 89056969 + 6688949796 = 9437^2 + 81786^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-6778006765 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11111182 + ... + 11111791.

It is an arithmetic number, because the mean of its divisors is an integer number (1033368291).

Almost surely, 2^6778006765 is an apocalyptic number.

It is an amenable number.

6778006765 is a deficient number, since it is larger than the sum of its proper divisors (1488939563).

6778006765 is a wasteful number, since it uses less digits than its factorization.

6778006765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22223039.

The product of its (nonzero) digits is 2963520, while the sum is 52.

The square root of 6778006765 is about 82328.6509363539. The cubic root of 6778006765 is about 1892.4917690799.

The spelling of 6778006765 in words is "six billion, seven hundred seventy-eight million, six thousand, seven hundred sixty-five".