6780447 has 6 divisors (see below), whose sum is σ = 9793992. Its totient is φ = 4520292.

The previous prime is 6780443. The next prime is 6780463. The reversal of 6780447 is 7440876.

It is a happy number.

It is not a de Polignac number, because 6780447 - 2² = 6780443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6780443) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 376683 + ... + 376700.

It is an arithmetic number, because the mean of its divisors is an integer number (1632332).

Almost surely, 2^6780447 is an apocalyptic number.

6780447 is a deficient number, since it is larger than the sum of its proper divisors (3013545).

6780447 is a wasteful number, since it uses less digits than its factorization.

6780447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753389 (or 753386 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The square root of 6780447 is about 2603.9291465015. The cubic root of 6780447 is about 189.2718855042.

It can be divided in two parts, 6780 and 447, that added together give a palindrome (7227).

The spelling of 6780447 in words is "six million, seven hundred eighty thousand, four hundred forty-seven".