6641836 has 12 divisors (see below), whose sum is σ = 11907000. Its totient is φ = 3239840.

The previous prime is 6641827. The next prime is 6641839. The reversal of 6641836 is 6381466.

It is a super-2 number, since 2×6641836² = 88227970901792, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6641839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20086 + ... + 20413.

It is an arithmetic number, because the mean of its divisors is an integer number (992250).

Almost surely, 2^6641836 is an apocalyptic number.

It is an amenable number.

6641836 is a deficient number, since it is larger than the sum of its proper divisors (5265164).

6641836 is a wasteful number, since it uses less digits than its factorization.

6641836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40544 (or 40542 counting only the distinct ones).

The product of its digits is 20736, while the sum is 34.

The square root of 6641836 is about 2577.1759738132. The cubic root of 6641836 is about 187.9732495513.

It can be divided in two parts, 664 and 1836, that added together give a square (2500 = 50²).

The spelling of 6641836 in words is "six million, six hundred forty-one thousand, eight hundred thirty-six".