6775561 has 8 divisors (see below), whose sum is σ = 7366464. Its totient is φ = 6194640.

The previous prime is 6775541. The next prime is 6775579. The reversal of 6775561 is 1655776.

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 6775561 - 2⁵ = 6775529 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6775561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6775541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1045 + ... + 3826.

It is an arithmetic number, because the mean of its divisors is an integer number (920808).

Almost surely, 2^6775561 is an apocalyptic number.

It is an amenable number.

6775561 is a deficient number, since it is larger than the sum of its proper divisors (590903).

6775561 is a wasteful number, since it uses less digits than its factorization.

6775561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4991.

The product of its digits is 44100, while the sum is 37.

The square root of 6775561 is about 2602.9907798531. The cubic root of 6775561 is about 189.2264113806.

The spelling of 6775561 in words is "six million, seven hundred seventy-five thousand, five hundred sixty-one".