6653609 has 4 divisors (see below), whose sum is σ = 6690960. Its totient is φ = 6616260.

The previous prime is 6653593. The next prime is 6653627. The reversal of 6653609 is 9063566.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9063566 = 2 ⋅4531783.

It is a cyclic number.

It is not a de Polignac number, because 6653609 - 2⁴ = 6653593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6653659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18407 + ... + 18764.

It is an arithmetic number, because the mean of its divisors is an integer number (1672740).

Almost surely, 2^6653609 is an apocalyptic number.

It is an amenable number.

6653609 is a deficient number, since it is larger than the sum of its proper divisors (37351).

6653609 is a wasteful number, since it uses less digits than its factorization.

6653609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37350.

The product of its (nonzero) digits is 29160, while the sum is 35.

The square root of 6653609 is about 2579.4590518169. The cubic root of 6653609 is about 188.0842481164.

The spelling of 6653609 in words is "six million, six hundred fifty-three thousand, six hundred nine".