9211844947966 has 16 divisors (see below), whose sum is σ = 14076723125808. Its totient is φ = 4519952668800.

The previous prime is 9211844947919. The next prime is 9211844947969. The reversal of 9211844947966 is 6697494481129.

It is a junction number, because it is equal to n+sod(n) for n = 9211844947895 and 9211844947904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9211844947969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87137620 + ... + 87243271.

It is an arithmetic number, because the mean of its divisors is an integer number (879795195363).

Almost surely, 2^{9211844947966} is an apocalyptic number.

9211844947966 is a deficient number, since it is larger than the sum of its proper divisors (4864878177842).

9211844947966 is a wasteful number, since it uses less digits than its factorization.

9211844947966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174381387.

The product of its digits is 188116992, while the sum is 70.

The spelling of 9211844947966 in words is "nine trillion, two hundred eleven billion, eight hundred forty-four million, nine hundred forty-seven thousand, nine hundred sixty-six".