6778580069 has 16 divisors (see below), whose sum is σ = 6955660800. Its totient is φ = 6604101504.

The previous prime is 6778580059. The next prime is 6778580077. The reversal of 6778580069 is 9600858776.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6778580069 is a prime.

It is a super-2 number, since 2×6778580069² = 91898295503688089522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6778579996 and 6778580023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6778580059) 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, 6798479 + ... + 6799475.

It is an arithmetic number, because the mean of its divisors is an integer number (434728800).

Almost surely, 2^6778580069 is an apocalyptic number.

It is an amenable number.

6778580069 is a deficient number, since it is larger than the sum of its proper divisors (177080731).

6778580069 is an equidigital number, since it uses as much as digits as its factorization.

6778580069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2132.

The product of its (nonzero) digits is 5080320, while the sum is 56.

The square root of 6778580069 is about 82332.1326639848. The cubic root of 6778580069 is about 1892.5451251058.

The spelling of 6778580069 in words is "six billion, seven hundred seventy-eight million, five hundred eighty thousand, sixty-nine".