6628651 has 2 divisors, whose sum is σ = 6628652. Its totient is φ = 6628650.

The previous prime is 6628639. The next prime is 6628667. The reversal of 6628651 is 1568266.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6628651 - 2¹¹ = 6626603 is a prime.

It is not a weakly prime, because it can be changed into another prime (6628621) 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, 3314325 + 3314326.

It is an arithmetic number, because the mean of its divisors is an integer number (3314326).

Almost surely, 2^6628651 is an apocalyptic number.

6628651 is a deficient number, since it is larger than the sum of its proper divisors (1).

6628651 is an equidigital number, since it uses as much as digits as its factorization.

6628651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 34.

The square root of 6628651 is about 2574.6166704968. The cubic root of 6628651 is about 187.8487825055.

The spelling of 6628651 in words is "six million, six hundred twenty-eight thousand, six hundred fifty-one".