6659611 has 4 divisors (see below), whose sum is σ = 7610992. Its totient is φ = 5708232.

The previous prime is 6659591. The next prime is 6659623. The reversal of 6659611 is 1169566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6659611 - 2⁵ = 6659579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6659111) 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 3 ways as a sum of consecutive naturals, for example, 475680 + ... + 475693.

It is an arithmetic number, because the mean of its divisors is an integer number (1902748).

Almost surely, 2^6659611 is an apocalyptic number.

6659611 is a deficient number, since it is larger than the sum of its proper divisors (951381).

6659611 is an equidigital number, since it uses as much as digits as its factorization.

6659611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 951380.

The product of its digits is 9720, while the sum is 34.

The square root of 6659611 is about 2580.6222117931. The cubic root of 6659611 is about 188.1407859735.

The spelling of 6659611 in words is "six million, six hundred fifty-nine thousand, six hundred eleven".