6646039 has 2 divisors, whose sum is σ = 6646040. Its totient is φ = 6646038.

The previous prime is 6646019. The next prime is 6646049. The reversal of 6646039 is 9306466.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6646039 - 2⁷ = 6645911 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6645995 and 6646013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6646019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3323019 + 3323020.

It is an arithmetic number, because the mean of its divisors is an integer number (3323020).

Almost surely, 2^6646039 is an apocalyptic number.

6646039 is a deficient number, since it is larger than the sum of its proper divisors (1).

6646039 is an equidigital number, since it uses as much as digits as its factorization.

6646039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 6646039 is about 2577.9912722893. The cubic root of 6646039 is about 188.0128914504.

The spelling of 6646039 in words is "six million, six hundred forty-six thousand, thirty-nine".