6778006771 has 4 divisors (see below), whose sum is σ = 6780625344. Its totient is φ = 6775388200.

The previous prime is 6778006751. The next prime is 6778006783. The reversal of 6778006771 is 1776008776.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6778006771 - 2²¹ = 6775909619 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6778006751) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1305400 + ... + 1310581.

It is an arithmetic number, because the mean of its divisors is an integer number (1695156336).

Almost surely, 2^6778006771 is an apocalyptic number.

6778006771 is a deficient number, since it is larger than the sum of its proper divisors (2618573).

6778006771 is a wasteful number, since it uses less digits than its factorization.

6778006771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2618572.

The product of its (nonzero) digits is 691488, while the sum is 49.

The square root of 6778006771 is about 82328.6509727932. The cubic root of 6778006771 is about 1892.4917696384.

The spelling of 6778006771 in words is "six billion, seven hundred seventy-eight million, six thousand, seven hundred seventy-one".