6642164 has 24 divisors (see below), whose sum is σ = 12055176. Its totient is φ = 3200000.

The previous prime is 6642151. The next prime is 6642169. The reversal of 6642164 is 4612466.

It can be written as a sum of positive squares in 4 ways, for example, as 3062500 + 3579664 = 1750^2 + 1892^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642169) 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, 16364 + ... + 16764.

It is an arithmetic number, because the mean of its divisors is an integer number (502299).

Almost surely, 2^6642164 is an apocalyptic number.

It is an amenable number.

6642164 is a deficient number, since it is larger than the sum of its proper divisors (5413012).

6642164 is a wasteful number, since it uses less digits than its factorization.

6642164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547 (or 545 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 6642164 is about 2577.2396085735. The cubic root of 6642164 is about 187.9763437867.

The spelling of 6642164 in words is "six million, six hundred forty-two thousand, one hundred sixty-four".