6642517 has 8 divisors (see below), whose sum is σ = 7616000. Its totient is φ = 5675184.

The previous prime is 6642497. The next prime is 6642521. The reversal of 6642517 is 7152466.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6642517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642817) 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 in 7 ways as a sum of consecutive naturals, for example, 1084 + ... + 3802.

It is an arithmetic number, because the mean of its divisors is an integer number (952000).

Almost surely, 2^6642517 is an apocalyptic number.

It is an amenable number.

6642517 is a deficient number, since it is larger than the sum of its proper divisors (973483).

6642517 is a wasteful number, since it uses less digits than its factorization.

6642517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3075.

The product of its digits is 10080, while the sum is 31.

The square root of 6642517 is about 2577.3080917888. The cubic root of 6642517 is about 187.9796737493.

The spelling of 6642517 in words is "six million, six hundred forty-two thousand, five hundred seventeen".