6601709 has 4 divisors (see below), whose sum is σ = 6609504. Its totient is φ = 6593916.

The previous prime is 6601703. The next prime is 6601717. The reversal of 6601709 is 9071066.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 6601709 - 2²⁰ = 5553133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6601703) 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, 2447 + ... + 4380.

It is an arithmetic number, because the mean of its divisors is an integer number (1652376).

Almost surely, 2^6601709 is an apocalyptic number.

It is an amenable number.

6601709 is a deficient number, since it is larger than the sum of its proper divisors (7795).

6601709 is an equidigital number, since it uses as much as digits as its factorization.

6601709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7794.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 6601709 is about 2569.3791078780. The cubic root of 6601709 is about 187.5939345620.

The spelling of 6601709 in words is "six million, six hundred one thousand, seven hundred nine".