6659601 has 8 divisors (see below), whose sum is σ = 9562560. Its totient is φ = 4098192.

The previous prime is 6659591. The next prime is 6659623. The reversal of 6659601 is 1069566.

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

It is not a de Polignac number, because 6659601 - 2⁹ = 6659089 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6659201) 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, 85341 + ... + 85418.

It is an arithmetic number, because the mean of its divisors is an integer number (1195320).

Almost surely, 2^6659601 is an apocalyptic number.

It is an amenable number.

6659601 is a deficient number, since it is larger than the sum of its proper divisors (2902959).

6659601 is a wasteful number, since it uses less digits than its factorization.

6659601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170775.

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 6659601 is about 2580.6202742752. The cubic root of 6659601 is about 188.1406918034.

It can be divided in two parts, 6659 and 601, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 6659601 in words is "six million, six hundred fifty-nine thousand, six hundred one".