11666193648 has 80 divisors (see below), whose sum is σ = 32032116480. Its totient is φ = 3648264192.

The previous prime is 11666193641. The next prime is 11666193683. The reversal of 11666193648 is 84639166611.

It is a super-2 number, since 2×11666193648² (a number of 21 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 11666193648.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11666193641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31840 + ... + 156032.

It is an arithmetic number, because the mean of its divisors is an integer number (400401456).

Almost surely, 2^11666193648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11666193648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16016058240).

11666193648 is an abundant number, since it is smaller than the sum of its proper divisors (20365922832).

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

11666193648 is a wasteful number, since it uses less digits than its factorization.

11666193648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124326 (or 124320 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 51.

The spelling of 11666193648 in words is "eleven billion, six hundred sixty-six million, one hundred ninety-three thousand, six hundred forty-eight".