11666215233 has 12 divisors (see below), whose sum is σ = 17243088720. Its totient is φ = 7596605016.

The previous prime is 11666215229. The next prime is 11666215241. The reversal of 11666215233 is 33251266611.

It is not a de Polignac number, because 11666215233 - 2² = 11666215229 is a prime.

It is a super-3 number, since 3×11666215233³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11666215333) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15072243 + ... + 15073016.

It is an arithmetic number, because the mean of its divisors is an integer number (1436924060).

Almost surely, 2^11666215233 is an apocalyptic number.

It is an amenable number.

11666215233 is a deficient number, since it is larger than the sum of its proper divisors (5576873487).

11666215233 is a wasteful number, since it uses less digits than its factorization.

11666215233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30145308 (or 30145305 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The spelling of 11666215233 in words is "eleven billion, six hundred sixty-six million, two hundred fifteen thousand, two hundred thirty-three".