11666215236 has 96 divisors (see below), whose sum is σ = 30409666560. Its totient is φ = 3456262656.

The previous prime is 11666215229. The next prime is 11666215241. The reversal of 11666215236 is 63251266611.

It is a super-3 number, since 3×11666215236³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 11666215194 and 11666215203.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1729326 + ... + 1736058.

It is an arithmetic number, because the mean of its divisors is an integer number (316767360).

Almost surely, 2^11666215236 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 11666215236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15204833280).

11666215236 is an abundant number, since it is smaller than the sum of its proper divisors (18743451324).

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

11666215236 is a wasteful number, since it uses less digits than its factorization.

11666215236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7165 (or 7163 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The spelling of 11666215236 in words is "eleven billion, six hundred sixty-six million, two hundred fifteen thousand, two hundred thirty-six".