6664380 has 48 divisors (see below), whose sum is σ = 19267584. Its totient is φ = 1719360.

The previous prime is 6664351. The next prime is 6664381. The reversal of 6664380 is 834666.

6664380 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6664381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69 + ... + 3651.

It is an arithmetic number, because the mean of its divisors is an integer number (401408).

Almost surely, 2^6664380 is an apocalyptic number.

6664380 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 6664380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9633792).

6664380 is an abundant number, since it is smaller than the sum of its proper divisors (12603204).

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

6664380 is a wasteful number, since it uses less digits than its factorization.

6664380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3626 (or 3624 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 6664380 is about 2581.5460483981. The cubic root of 6664380 is about 188.1856849583.

It can be divided in two parts, 66 and 64380, that added together give a palindrome (64446).

The spelling of 6664380 in words is "six million, six hundred sixty-four thousand, three hundred eighty".