6659517 has 4 divisors (see below), whose sum is σ = 8879360. Its totient is φ = 4439676.

The previous prime is 6659501. The next prime is 6659561. The reversal of 6659517 is 7159566.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6659517 - 2⁴ = 6659501 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6659567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1109917 + ... + 1109922.

It is an arithmetic number, because the mean of its divisors is an integer number (2219840).

Almost surely, 2^6659517 is an apocalyptic number.

It is an amenable number.

6659517 is a deficient number, since it is larger than the sum of its proper divisors (2219843).

6659517 is a wasteful number, since it uses less digits than its factorization.

6659517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219842.

The product of its digits is 56700, while the sum is 39.

The square root of 6659517 is about 2580.6039990669. The cubic root of 6659517 is about 188.1399007708.

The spelling of 6659517 in words is "six million, six hundred fifty-nine thousand, five hundred seventeen".