6560661 has 8 divisors (see below), whose sum is σ = 8811040. Its totient is φ = 4342032.

The previous prime is 6560651. The next prime is 6560663. The reversal of 6560661 is 1660656.

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

It is not a de Polignac number, because 6560661 - 2⁶ = 6560597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6560663) 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, 7450 + ... + 8283.

It is an arithmetic number, because the mean of its divisors is an integer number (1101380).

Almost surely, 2^6560661 is an apocalyptic number.

It is an amenable number.

6560661 is a deficient number, since it is larger than the sum of its proper divisors (2250379).

6560661 is a wasteful number, since it uses less digits than its factorization.

6560661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15875.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 6560661 is about 2561.3787302935. The cubic root of 6560661 is about 187.2043197465.

It can be divided in two parts, 65 and 60661, that added together give a triangular number (60726 = T₃₄₈).

The spelling of 6560661 in words is "six million, five hundred sixty thousand, six hundred sixty-one".