6642870 has 32 divisors (see below), whose sum is σ = 17170272. Its totient is φ = 1635072.

The previous prime is 6642863. The next prime is 6642877. The reversal of 6642870 is 782466.

It is an interprime number because it is at equal distance from previous prime (6642863) and next prime (6642877).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642877) 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 15 ways as a sum of consecutive naturals, for example, 8127 + ... + 8906.

It is an arithmetic number, because the mean of its divisors is an integer number (536571).

Almost surely, 2^6642870 is an apocalyptic number.

6642870 is an abundant number, since it is smaller than the sum of its proper divisors (10527402).

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

6642870 is a wasteful number, since it uses less digits than its factorization.

6642870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17056.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 6642870 is about 2577.3765731844. The cubic root of 6642870 is about 187.9830035940.

The spelling of 6642870 in words is "six million, six hundred forty-two thousand, eight hundred seventy".