6649613 has 8 divisors (see below), whose sum is σ = 6907680. Its totient is φ = 6393520.

The previous prime is 6649609. The next prime is 6649627. The reversal of 6649613 is 3169466.

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 6649613 - 2² = 6649609 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 (6649633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13298 + ... + 13788.

It is an arithmetic number, because the mean of its divisors is an integer number (863460).

Almost surely, 2^6649613 is an apocalyptic number.

It is an amenable number.

6649613 is a deficient number, since it is larger than the sum of its proper divisors (258067).

6649613 is a wasteful number, since it uses less digits than its factorization.

6649613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987.

The product of its digits is 23328, while the sum is 35.

The square root of 6649613 is about 2578.6843544723. The cubic root of 6649613 is about 188.0465875942.

The spelling of 6649613 in words is "six million, six hundred forty-nine thousand, six hundred thirteen".