9996211566 has 64 divisors (see below), whose sum is σ = 24459874560. Its totient is φ = 3000826080.

The previous prime is 9996211507. The next prime is 9996211639. The reversal of 9996211566 is 6651126999.

9996211566 is a `hidden beast` number, since 9 + 9 + 9 + 62 + 11 + 566 = 666.

9996211566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 15081 + ... + 142196.

It is an arithmetic number, because the mean of its divisors is an integer number (382185540).

Almost surely, 2^9996211566 is an apocalyptic number.

9996211566 is an abundant number, since it is smaller than the sum of its proper divisors (14463662994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9996211566 is a wasteful number, since it uses less digits than its factorization.

9996211566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157406 (or 157400 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 54.

The square root of 9996211566 is about 99981.0560356311. The cubic root of 9996211566 is about 2154.1625912137.

The spelling of 9996211566 in words is "nine billion, nine hundred ninety-six million, two hundred eleven thousand, five hundred sixty-six".