6780809 has 8 divisors (see below), whose sum is σ = 8016960. Its totient is φ = 5611536.

The previous prime is 6780769. The next prime is 6780817. The reversal of 6780809 is 9080876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6780809 - 2¹² = 6776713 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6780859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16499 + ... + 16904.

It is an arithmetic number, because the mean of its divisors is an integer number (1002120).

Almost surely, 2^6780809 is an apocalyptic number.

It is an amenable number.

6780809 is a deficient number, since it is larger than the sum of its proper divisors (1236151).

6780809 is a wasteful number, since it uses less digits than its factorization.

6780809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33439.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 6780809 is about 2603.9986559136. The cubic root of 6780809 is about 189.2752537778.

The spelling of 6780809 in words is "six million, seven hundred eighty thousand, eight hundred nine".