6663757481 has 8 divisors (see below), whose sum is σ = 6691532928. Its totient is φ = 6636006000.

The previous prime is 6663757459. The next prime is 6663757493. The reversal of 6663757481 is 1847573666.

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 6663757481 - 2¹⁰ = 6663756457 is a prime.

It is a super-2 number, since 2×6663757481² = 88811327531166930722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6663754481) 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, 738326 + ... + 747296.

It is an arithmetic number, because the mean of its divisors is an integer number (836441616).

Almost surely, 2^6663757481 is an apocalyptic number.

It is an amenable number.

6663757481 is a deficient number, since it is larger than the sum of its proper divisors (27775447).

6663757481 is a wasteful number, since it uses less digits than its factorization.

6663757481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11983.

The product of its digits is 5080320, while the sum is 53.

The square root of 6663757481 is about 81631.8410976991. The cubic root of 6663757481 is about 1881.7982530781.

The spelling of 6663757481 in words is "six billion, six hundred sixty-three million, seven hundred fifty-seven thousand, four hundred eighty-one".