6646049 has 2 divisors, whose sum is σ = 6646050. Its totient is φ = 6646048.

The previous prime is 6646039. The next prime is 6646153. The reversal of 6646049 is 9406466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6091024 + 555025 = 2468^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 6646049 - 2¹² = 6641953 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon 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, 3323024 + 3323025.

It is an arithmetic number, because the mean of its divisors is an integer number (3323025).

Almost surely, 2^6646049 is an apocalyptic number.

It is an amenable number.

6646049 is a deficient number, since it is larger than the sum of its proper divisors (1).

6646049 is an equidigital number, since it uses as much as digits as its factorization.

6646049 is an evil number, because the sum of its binary digits is even.

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

The square root of 6646049 is about 2577.9932117831. The cubic root of 6646049 is about 188.0129857486.

Adding to 6646049 its sum of digits (35), we get a square (6646084 = 2578²).

The spelling of 6646049 in words is "six million, six hundred forty-six thousand, forty-nine".