6642425670 has 16 divisors (see below), whose sum is σ = 15941821680. Its totient is φ = 1771313504.

The previous prime is 6642425663. The next prime is 6642425677. The reversal of 6642425670 is 765242466.

It is an interprime number because it is at equal distance from previous prime (6642425663) and next prime (6642425677).

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 (6642425677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110707065 + ... + 110707124.

It is an arithmetic number, because the mean of its divisors is an integer number (996363855).

Almost surely, 2^6642425670 is an apocalyptic number.

6642425670 is an abundant number, since it is smaller than the sum of its proper divisors (9299396010).

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

6642425670 is a wasteful number, since it uses less digits than its factorization.

6642425670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221414199.

The product of its (nonzero) digits is 483840, while the sum is 42.

The square root of 6642425670 is about 81501.0777229357. The cubic root of 6642425670 is about 1879.7881221534.

The spelling of 6642425670 in words is "six billion, six hundred forty-two million, four hundred twenty-five thousand, six hundred seventy".