6650809 has 4 divisors (see below), whose sum is σ = 7255440. Its totient is φ = 6046180.

The previous prime is 6650801. The next prime is 6650821. The reversal of 6650809 is 9080566.

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 6650809 - 2³ = 6650801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6650801) 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, 302299 + ... + 302320.

It is an arithmetic number, because the mean of its divisors is an integer number (1813860).

Almost surely, 2^6650809 is an apocalyptic number.

It is an amenable number.

6650809 is a deficient number, since it is larger than the sum of its proper divisors (604631).

6650809 is a wasteful number, since it uses less digits than its factorization.

6650809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604630.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 6650809 is about 2578.9162452472. The cubic root of 6650809 is about 188.0578609438.

The spelling of 6650809 in words is "six million, six hundred fifty thousand, eight hundred nine".