6549665 has 8 divisors (see below), whose sum is σ = 7889640. Its totient is φ = 5219712.

The previous prime is 6549619. The next prime is 6549671. The reversal of 6549665 is 5669456.

6549665 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 204304 + 6345361 = 452^2 + 2519^2 .

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 6549665 - 2⁶ = 6549601 is a prime.

It is a super-2 number, since 2×6549665² = 85796223224450, which contains 22 as substring.

It is an Ulam number.

It is an unprimeable number.

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, 980 + ... + 3749.

It is an arithmetic number, because the mean of its divisors is an integer number (986205).

Almost surely, 2^6549665 is an apocalyptic number.

It is an amenable number.

6549665 is a deficient number, since it is larger than the sum of its proper divisors (1339975).

6549665 is a wasteful number, since it uses less digits than its factorization.

6549665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5011.

The product of its digits is 194400, while the sum is 41.

The square root of 6549665 is about 2559.2313299114. The cubic root of 6549665 is about 187.0996732878.

The spelling of 6549665 in words is "six million, five hundred forty-nine thousand, six hundred sixty-five".