6605906 has 8 divisors (see below), whose sum is σ = 10176780. Its totient is φ = 3213648.

The previous prime is 6605903. The next prime is 6605909. The reversal of 6605906 is 6095066.

It is an interprime number because it is at equal distance from previous prime (6605903) and next prime (6605909).

It can be written as a sum of positive squares in 2 ways, for example, as 6477025 + 128881 = 2545^2 + 359^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6605903) 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, 44561 + ... + 44708.

Almost surely, 2^6605906 is an apocalyptic number.

6605906 is a deficient number, since it is larger than the sum of its proper divisors (3570874).

6605906 is a wasteful number, since it uses less digits than its factorization.

6605906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89308.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 6605906 is about 2570.1957123923. The cubic root of 6605906 is about 187.6336800762.

The spelling of 6605906 in words is "six million, six hundred five thousand, nine hundred six".