6642798 has 16 divisors (see below), whose sum is σ = 13744080. Its totient is φ = 2137856.

The previous prime is 6642793. The next prime is 6642803. The reversal of 6642798 is 8972466.

It is an interprime number because it is at equal distance from previous prime (6642793) and next prime (6642803).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642793) 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, 18915 + ... + 19262.

It is an arithmetic number, because the mean of its divisors is an integer number (859005).

Almost surely, 2^6642798 is an apocalyptic number.

6642798 is an abundant number, since it is smaller than the sum of its proper divisors (7101282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6642798 is a wasteful number, since it uses less digits than its factorization.

6642798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38211.

The product of its digits is 145152, while the sum is 42.

The square root of 6642798 is about 2577.3626054554. The cubic root of 6642798 is about 187.9823244284.

The spelling of 6642798 in words is "six million, six hundred forty-two thousand, seven hundred ninety-eight".