11997466865664 has 208 divisors, whose sum is σ = 36620233681920. Its totient is φ = 3422129356800.

The previous prime is 11997466865647. The next prime is 11997466865693. The reversal of 11997466865664 is 46656866479911.

It is a super-2 number, since 2×11997466865664² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11997466865664.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51579577 + ... + 51811655.

Almost surely, 2^{11997466865664} is an apocalyptic number.

11997466865664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11997466865664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18310116840960).

11997466865664 is an abundant number, since it is smaller than the sum of its proper divisors (24622766816256).

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

11997466865664 is an equidigital number, since it uses as much as digits as its factorization.

11997466865664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232714 (or 232692 counting only the distinct ones).

The product of its digits is 2821754880, while the sum is 78.

The spelling of 11997466865664 in words is "eleven trillion, nine hundred ninety-seven billion, four hundred sixty-six million, eight hundred sixty-five thousand, six hundred sixty-four".