6616813 has 16 divisors (see below), whose sum is σ = 7833600. Its totient is φ = 5586000.

The previous prime is 6616789. The next prime is 6616837. The reversal of 6616813 is 3186166.

It is an interprime number because it is at equal distance from previous prime (6616789) and next prime (6616837).

It is not a de Polignac number, because 6616813 - 2⁵ = 6616781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6616873) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34548 + ... + 34738.

It is an arithmetic number, because the mean of its divisors is an integer number (489600).

Almost surely, 2^6616813 is an apocalyptic number.

It is an amenable number.

6616813 is a deficient number, since it is larger than the sum of its proper divisors (1216787).

6616813 is a wasteful number, since it uses less digits than its factorization.

6616813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 299 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 6616813 is about 2572.3166601334. The cubic root of 6616813 is about 187.7368905086.

The spelling of 6616813 in words is "six million, six hundred sixteen thousand, eight hundred thirteen".