6644069 has 2 divisors, whose sum is σ = 6644070. Its totient is φ = 6644068.

The previous prime is 6644047. The next prime is 6644081. The reversal of 6644069 is 9604466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6100900 + 543169 = 2470^2 + 737^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6644069 is a prime.

It is a super-2 number, since 2×6644069² = 88287305753522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p₄₅₃₉₆₈ and since 6644069 and 453968 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6644269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3322034 + 3322035.

It is an arithmetic number, because the mean of its divisors is an integer number (3322035).

Almost surely, 2^6644069 is an apocalyptic number.

It is an amenable number.

6644069 is a deficient number, since it is larger than the sum of its proper divisors (1).

6644069 is an equidigital number, since it uses as much as digits as its factorization.

6644069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 6644069 is about 2577.6091635467. The cubic root of 6644069 is about 187.9943128655.

The spelling of 6644069 in words is "six million, six hundred forty-four thousand, sixty-nine".