6641920 has 36 divisors (see below), whose sum is σ = 15912540. Its totient is φ = 2656256.

The previous prime is 6641903. The next prime is 6641953. The reversal of 6641920 is 291466.

It can be written as a sum of positive squares in 2 ways, for example, as 3873024 + 2768896 = 1968^2 + 1664^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1315 + ... + 3874.

It is an arithmetic number, because the mean of its divisors is an integer number (442015).

Almost surely, 2^6641920 is an apocalyptic number.

It is an amenable number.

6641920 is an abundant number, since it is smaller than the sum of its proper divisors (9270620).

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

6641920 is an equidigital number, since it uses as much as digits as its factorization.

6641920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5210 (or 5196 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 6641920 is about 2577.1922706698. The cubic root of 6641920 is about 187.9740419872.

The spelling of 6641920 in words is "six million, six hundred forty-one thousand, nine hundred twenty".