6624181 has 8 divisors (see below), whose sum is σ = 6747840. Its totient is φ = 6501792.

The previous prime is 6624143. The next prime is 6624197. The reversal of 6624181 is 1814266.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6624181 is a prime.

It is a super-2 number, since 2×6624181² = 87759547841522, which contains 22 as substring.

It is a Duffinian number.

6624181 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6624481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23266 + ... + 23548.

It is an arithmetic number, because the mean of its divisors is an integer number (843480).

Almost surely, 2^6624181 is an apocalyptic number.

It is an amenable number.

6624181 is a deficient number, since it is larger than the sum of its proper divisors (123659).

6624181 is a wasteful number, since it uses less digits than its factorization.

6624181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635.

The product of its digits is 2304, while the sum is 28.

The square root of 6624181 is about 2573.7484337052. The cubic root of 6624181 is about 187.8065480260.

The spelling of 6624181 in words is "six million, six hundred twenty-four thousand, one hundred eighty-one".