6631824681 has 12 divisors (see below), whose sum is σ = 9585886960. Its totient is φ = 4418177400.

The previous prime is 6631824677. The next prime is 6631824701. The reversal of 6631824681 is 1864281366.

6631824681 is a `hidden beast` number, since 6 + 6 + 3 + 182 + 468 + 1 = 666.

It is not a de Polignac number, because 6631824681 - 2² = 6631824677 is a prime.

It is a super-2 number, since 2×6631824681² = 87962197199041503522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6631824601) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 239395 + ... + 265656.

Almost surely, 2^6631824681 is an apocalyptic number.

It is an amenable number.

6631824681 is a deficient number, since it is larger than the sum of its proper divisors (2954062279).

6631824681 is a wasteful number, since it uses less digits than its factorization.

6631824681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506516 (or 506513 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 6631824681 is about 81436.0158713576. The cubic root of 6631824681 is about 1878.7875728173.

The spelling of 6631824681 in words is "six billion, six hundred thirty-one million, eight hundred twenty-four thousand, six hundred eighty-one".