6786561 has 8 divisors (see below), whose sum is σ = 9259360. Its totient is φ = 4419072.

The previous prime is 6786557. The next prime is 6786581. The reversal of 6786561 is 1656876.

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

It is not a de Polignac number, because 6786561 - 2² = 6786557 is a prime.

It is a Duffinian number.

6786561 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6786511) 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, 26176 + ... + 26433.

It is an arithmetic number, because the mean of its divisors is an integer number (1157420).

Almost surely, 2^6786561 is an apocalyptic number.

It is an amenable number.

6786561 is a deficient number, since it is larger than the sum of its proper divisors (2472799).

6786561 is a wasteful number, since it uses less digits than its factorization.

6786561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52655.

The product of its digits is 60480, while the sum is 39.

The square root of 6786561 is about 2605.1028770473. The cubic root of 6786561 is about 189.3287578932.

The spelling of 6786561 in words is "six million, seven hundred eighty-six thousand, five hundred sixty-one".