6664020 has 96 divisors (see below), whose sum is σ = 21288960. Its totient is φ = 1541760.

The previous prime is 6664019. The next prime is 6664027. The reversal of 6664020 is 204666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664027) 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 31 ways as a sum of consecutive naturals, for example, 14961 + ... + 15399.

It is an arithmetic number, because the mean of its divisors is an integer number (221760).

Almost surely, 2^6664020 is an apocalyptic number.

6664020 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 6664020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10644480).

6664020 is an abundant number, since it is smaller than the sum of its proper divisors (14624940).

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

6664020 is a wasteful number, since it uses less digits than its factorization.

6664020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485 (or 483 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 6664020 is about 2581.4763217973. The cubic root of 6664020 is about 188.1822963927.

Adding to 6664020 its reverse (204666), we get a palindrome (6868686).

The spelling of 6664020 in words is "six million, six hundred sixty-four thousand, twenty".