6624013681 has 8 divisors (see below), whose sum is σ = 6990217280. Its totient is φ = 6259567248.

The previous prime is 6624013673. The next prime is 6624013687. The reversal of 6624013681 is 1863104266.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6624013681 - 2³ = 6624013673 is a prime.

It is a super-2 number, since 2×6624013681² = 87755114492150339522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6624013681.

It is not an unprimeable number, because it can be changed into a prime (6624013687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431541 + ... + 446626.

It is an arithmetic number, because the mean of its divisors is an integer number (873777160).

Almost surely, 2^6624013681 is an apocalyptic number.

It is an amenable number.

6624013681 is a deficient number, since it is larger than the sum of its proper divisors (366203599).

6624013681 is a wasteful number, since it uses less digits than its factorization.

6624013681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878583.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 6624013681 is about 81388.0438455182. The cubic root of 6624013681 is about 1878.0496675537.

The spelling of 6624013681 in words is "six billion, six hundred twenty-four million, thirteen thousand, six hundred eighty-one".