6778529069 has 16 divisors (see below), whose sum is σ = 7346287872. Its totient is φ = 6217474368.

The previous prime is 6778529063. The next prime is 6778529083. The reversal of 6778529069 is 9609258776.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6778529069 is a prime.

It is a super-2 number, since 2×6778529069² = 91896912678556013522, 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 = 6778528999 and 6778529017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6778529063) 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, 3284732 + ... + 3286794.

It is an arithmetic number, because the mean of its divisors is an integer number (459142992).

Almost surely, 2^6778529069 is an apocalyptic number.

It is an amenable number.

6778529069 is a deficient number, since it is larger than the sum of its proper divisors (567758803).

6778529069 is a wasteful number, since it uses less digits than its factorization.

6778529069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3556.

The product of its (nonzero) digits is 11430720, while the sum is 59.

The square root of 6778529069 is about 82331.8229422864. The cubic root of 6778529069 is about 1892.5403787802.

The spelling of 6778529069 in words is "six billion, seven hundred seventy-eight million, five hundred twenty-nine thousand, sixty-nine".