6642497 has 2 divisors, whose sum is σ = 6642498. Its totient is φ = 6642496.

The previous prime is 6642487. The next prime is 6642521. The reversal of 6642497 is 7942466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5909761 + 732736 = 2431^2 + 856^2 .

It is a cyclic number.

It is not a de Polignac number, because 6642497 - 2¹⁰ = 6641473 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6642497.

It is not a weakly prime, because it can be changed into another prime (6642487) 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, 3321248 + 3321249.

It is an arithmetic number, because the mean of its divisors is an integer number (3321249).

Almost surely, 2^6642497 is an apocalyptic number.

It is an amenable number.

6642497 is a deficient number, since it is larger than the sum of its proper divisors (1).

6642497 is an equidigital number, since it uses as much as digits as its factorization.

6642497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 38.

The square root of 6642497 is about 2577.3042117686. The cubic root of 6642497 is about 187.9794850860.

The spelling of 6642497 in words is "six million, six hundred forty-two thousand, four hundred ninety-seven".