6646331 has 2 divisors, whose sum is σ = 6646332. Its totient is φ = 6646330.

The previous prime is 6646319. The next prime is 6646357. The reversal of 6646331 is 1336466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6646331 - 2¹⁸ = 6384187 is a prime.

It is a super-2 number, since 2×6646331² = 88347431523122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 6646294 and 6646303.

It is not a weakly prime, because it can be changed into another prime (6646361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3323165 + 3323166.

It is an arithmetic number, because the mean of its divisors is an integer number (3323166).

Almost surely, 2^6646331 is an apocalyptic number.

6646331 is a deficient number, since it is larger than the sum of its proper divisors (1).

6646331 is an equidigital number, since it uses as much as digits as its factorization.

6646331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 29.

The square root of 6646331 is about 2578.0479049079. The cubic root of 6646331 is about 188.0156449180.

The spelling of 6646331 in words is "six million, six hundred forty-six thousand, three hundred thirty-one".