6643117 has 16 divisors (see below), whose sum is σ = 7539840. Its totient is φ = 5810112.

The previous prime is 6643111. The next prime is 6643123. The reversal of 6643117 is 7113466.

It is an interprime number because it is at equal distance from previous prime (6643111) and next prime (6643123).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6643117 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 (6643111) 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, 25128 + ... + 25390.

It is an arithmetic number, because the mean of its divisors is an integer number (471240).

Almost surely, 2^6643117 is an apocalyptic number.

6643117 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

6643117 is a deficient number, since it is larger than the sum of its proper divisors (896723).

6643117 is a wasteful number, since it uses less digits than its factorization.

6643117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372.

The product of its digits is 3024, while the sum is 28.

The square root of 6643117 is about 2577.4244896796. The cubic root of 6643117 is about 187.9853334718.

The spelling of 6643117 in words is "six million, six hundred forty-three thousand, one hundred seventeen".