6641900 has 36 divisors (see below), whose sum is σ = 15264648. Its totient is φ = 2499840.

The previous prime is 6641891. The next prime is 6641903. The reversal of 6641900 is 91466.

It is a super-2 number, since 2×6641900² = 88229671220000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6641900.

It is not an unprimeable number, because it can be changed into a prime (6641903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254 + ... + 3653.

It is an arithmetic number, because the mean of its divisors is an integer number (424018).

Almost surely, 2^6641900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6641900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7632324).

6641900 is an abundant number, since it is smaller than the sum of its proper divisors (8622748).

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

6641900 is a wasteful number, since it uses less digits than its factorization.

6641900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938 (or 3931 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 6641900 is about 2577.1883904752. The cubic root of 6641900 is about 187.9738533126.

The spelling of 6641900 in words is "six million, six hundred forty-one thousand, nine hundred".