6616943 has 4 divisors (see below), whose sum is σ = 6636360. Its totient is φ = 6597528.

The previous prime is 6616931. The next prime is 6616991. The reversal of 6616943 is 3496166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3496166 = 2 ⋅1748083.

It is a cyclic number.

It is not a de Polignac number, because 6616943 - 2⁶ = 6616879 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 (6616993) 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, 9188 + ... + 9881.

It is an arithmetic number, because the mean of its divisors is an integer number (1659090).

Almost surely, 2^6616943 is an apocalyptic number.

6616943 is a deficient number, since it is larger than the sum of its proper divisors (19417).

6616943 is a wasteful number, since it uses less digits than its factorization.

6616943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19416.

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

The square root of 6616943 is about 2572.3419290600. The cubic root of 6616943 is about 187.7381199845.

The spelling of 6616943 in words is "six million, six hundred sixteen thousand, nine hundred forty-three".