6641040 has 160 divisors (see below), whose sum is σ = 24284160. Its totient is φ = 1469952.

The previous prime is 6641039. The next prime is 6641077. The reversal of 6641040 is 401466.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 6640998 and 6641016.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99087 + ... + 99153.

It is an arithmetic number, because the mean of its divisors is an integer number (151776).

Almost surely, 2^6641040 is an apocalyptic number.

6641040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6641040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12142080).

6641040 is an abundant number, since it is smaller than the sum of its proper divisors (17643120).

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

6641040 is a wasteful number, since it uses less digits than its factorization.

6641040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 6641040 is about 2577.0215365806. The cubic root of 6641040 is about 187.9657399469.

The spelling of 6641040 in words is "six million, six hundred forty-one thousand, forty".