6780643 has 8 divisors (see below), whose sum is σ = 7007040. Its totient is φ = 6557760.

The previous prime is 6780629. The next prime is 6780679. The reversal of 6780643 is 3460876.

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

It is a cyclic number.

It is not a de Polignac number, because 6780643 - 2⁵ = 6780611 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6780599 and 6780608.

It is not an unprimeable number, because it can be changed into a prime (6780623) 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, 3373 + ... + 4993.

It is an arithmetic number, because the mean of its divisors is an integer number (875880).

Almost surely, 2^6780643 is an apocalyptic number.

6780643 is a deficient number, since it is larger than the sum of its proper divisors (226397).

6780643 is a wasteful number, since it uses less digits than its factorization.

6780643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1757.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 6780643 is about 2603.9667816622. The cubic root of 6780643 is about 189.2737092252.

The spelling of 6780643 in words is "six million, seven hundred eighty thousand, six hundred forty-three".