6649441 has 2 divisors, whose sum is σ = 6649442. Its totient is φ = 6649440.

The previous prime is 6649417. The next prime is 6649453. The reversal of 6649441 is 1449466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5832225 + 817216 = 2415^2 + 904^2 .

It is a cyclic number.

It is not a de Polignac number, because 6649441 - 2¹¹ = 6647393 is a prime.

It is a super-2 number, since 2×6649441² = 88430131224962, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6649397 and 6649406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6649481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3324720 + 3324721.

It is an arithmetic number, because the mean of its divisors is an integer number (3324721).

Almost surely, 2^6649441 is an apocalyptic number.

It is an amenable number.

6649441 is a deficient number, since it is larger than the sum of its proper divisors (1).

6649441 is an equidigital number, since it uses as much as digits as its factorization.

6649441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 34.

The square root of 6649441 is about 2578.6510039166. The cubic root of 6649441 is about 188.0449662321.

The spelling of 6649441 in words is "six million, six hundred forty-nine thousand, four hundred forty-one".