6659709 has 16 divisors (see below), whose sum is σ = 10682880. Its totient is φ = 3605040.

The previous prime is 6659693. The next prime is 6659713. The reversal of 6659709 is 9079566.

It is not a de Polignac number, because 6659709 - 2⁴ = 6659693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6659749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7947 + ... + 8744.

It is an arithmetic number, because the mean of its divisors is an integer number (667680).

Almost surely, 2^6659709 is an apocalyptic number.

It is an amenable number.

6659709 is a deficient number, since it is larger than the sum of its proper divisors (4023171).

6659709 is a wasteful number, since it uses less digits than its factorization.

6659709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16720.

The product of its (nonzero) digits is 102060, while the sum is 42.

The square root of 6659709 is about 2580.6411993921. The cubic root of 6659709 is about 188.1417088355.

The spelling of 6659709 in words is "six million, six hundred fifty-nine thousand, seven hundred nine".