6601609 has 8 divisors (see below), whose sum is σ = 7648640. Its totient is φ = 5580576.

The previous prime is 6601601. The next prime is 6601631. The reversal of 6601609 is 9061066.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6601609 - 2³ = 6601601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6601601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5949 + ... + 6970.

It is an arithmetic number, because the mean of its divisors is an integer number (956080).

Almost surely, 2^6601609 is an apocalyptic number.

It is an amenable number.

6601609 is a deficient number, since it is larger than the sum of its proper divisors (1047031).

6601609 is a wasteful number, since it uses less digits than its factorization.

6601609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12999.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 6601609 is about 2569.3596478500. The cubic root of 6601609 is about 187.5929873584.

The spelling of 6601609 in words is "six million, six hundred one thousand, six hundred nine".