6601643 has 2 divisors, whose sum is σ = 6601644. Its totient is φ = 6601642.

The previous prime is 6601633. The next prime is 6601649. The reversal of 6601643 is 3461066.

6601643 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6601643 - 2¹⁴ = 6585259 is a prime.

It is not a weakly prime, because it can be changed into another prime (6601649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3300821 + 3300822.

It is an arithmetic number, because the mean of its divisors is an integer number (3300822).

Almost surely, 2^6601643 is an apocalyptic number.

6601643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6601643 is an equidigital number, since it uses as much as digits as its factorization.

6601643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 6601643 is about 2569.3662642761. The cubic root of 6601643 is about 187.5933094087.

The spelling of 6601643 in words is "six million, six hundred one thousand, six hundred forty-three".