9881814663 has 36 divisors (see below), whose sum is σ = 16616515968. Its totient is φ = 5642542080.

The previous prime is 9881814661. The next prime is 9881814667. The reversal of 9881814663 is 3664181889.

9881814663 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9881814663 - 2¹ = 9881814661 is a prime.

It is a super-2 number, since 2×9881814663² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9881814661) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 641095 + ... + 656327.

It is an arithmetic number, because the mean of its divisors is an integer number (461569888).

Almost surely, 2^9881814663 is an apocalyptic number.

9881814663 is a deficient number, since it is larger than the sum of its proper divisors (6734701305).

9881814663 is a wasteful number, since it uses less digits than its factorization.

9881814663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16724 (or 16714 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 9881814663 is about 99407.3169490053. The cubic root of 9881814663 is about 2145.9136128013.

The spelling of 9881814663 in words is "nine billion, eight hundred eighty-one million, eight hundred fourteen thousand, six hundred sixty-three".