6780069 has 6 divisors (see below), whose sum is σ = 9793446. Its totient is φ = 4520040.

The previous prime is 6780049. The next prime is 6780073. The reversal of 6780069 is 9600876.

It can be written as a sum of positive squares in only one way, i.e., 6563844 + 216225 = 2562^2 + 465^2 .

It is not a de Polignac number, because 6780069 - 2⁹ = 6779557 is a prime.

It is a super-2 number, since 2×6780069² = 91938671289522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6780019) 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 5 ways as a sum of consecutive naturals, for example, 376662 + ... + 376679.

It is an arithmetic number, because the mean of its divisors is an integer number (1632241).

Almost surely, 2^6780069 is an apocalyptic number.

It is an amenable number.

6780069 is a deficient number, since it is larger than the sum of its proper divisors (3013377).

6780069 is a wasteful number, since it uses less digits than its factorization.

6780069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753347 (or 753344 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 6780069 is about 2603.8565628698. The cubic root of 6780069 is about 189.2683682286.

The spelling of 6780069 in words is "six million, seven hundred eighty thousand, sixty-nine".