6780561 has 8 divisors (see below), whose sum is σ = 9433920. Its totient is φ = 4323792.

The previous prime is 6780551. The next prime is 6780581. The reversal of 6780561 is 1650876.

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

It is not a de Polignac number, because 6780561 - 2⁹ = 6780049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6780551) 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 7 ways as a sum of consecutive naturals, for example, 49066 + ... + 49203.

It is an arithmetic number, because the mean of its divisors is an integer number (1179240).

Almost surely, 2^6780561 is an apocalyptic number.

It is an amenable number.

6780561 is a deficient number, since it is larger than the sum of its proper divisors (2653359).

6780561 is a wasteful number, since it uses less digits than its factorization.

6780561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98295.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 6780561 is about 2603.9510364060. The cubic root of 6780561 is about 189.2729462442.

The spelling of 6780561 in words is "six million, seven hundred eighty thousand, five hundred sixty-one".