6779789825069 has 4 divisors (see below), whose sum is σ = 6814205002044. Its totient is φ = 6745374648096.

The previous prime is 6779789825063. The next prime is 6779789825093. The reversal of 6779789825069 is 9605289879776.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4487457563044 + 2292332262025 = 2118362^2 + 1514045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6779789825069 is a prime.

It is a super-2 number, since 2×6779789825069² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6779789825063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17207588192 + ... + 17207588585.

It is an arithmetic number, because the mean of its divisors is an integer number (1703551250511).

Almost surely, 2^{6779789825069} is an apocalyptic number.

It is an amenable number.

6779789825069 is a deficient number, since it is larger than the sum of its proper divisors (34415176975).

6779789825069 is a wasteful number, since it uses less digits than its factorization.

6779789825069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34415176974.

The product of its (nonzero) digits is 5761082880, while the sum is 83.

The spelling of 6779789825069 in words is "six trillion, seven hundred seventy-nine billion, seven hundred eighty-nine million, eight hundred twenty-five thousand, sixty-nine".