6604381 has 32 divisors (see below), whose sum is σ = 8847360. Its totient is φ = 4790016.

The previous prime is 6604379. The next prime is 6604387. The reversal of 6604381 is 1834066.

It is not a de Polignac number, because 6604381 - 2¹ = 6604379 is a prime.

It is a super-2 number, since 2×6604381² = 87235696786322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6604387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51940 + ... + 52066.

It is an arithmetic number, because the mean of its divisors is an integer number (276480).

Almost surely, 2^6604381 is an apocalyptic number.

It is an amenable number.

6604381 is a deficient number, since it is larger than the sum of its proper divisors (2242979).

6604381 is a wasteful number, since it uses less digits than its factorization.

6604381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 6604381 is about 2569.8990252537. The cubic root of 6604381 is about 187.6192403014.

It can be divided in two parts, 660 and 4381, that added together give a square (5041 = 71²).

The spelling of 6604381 in words is "six million, six hundred four thousand, three hundred eighty-one".