11666001101556 has 48 divisors (see below), whose sum is σ = 27282781975680. Its totient is φ = 3879795379200.

The previous prime is 11666001101527. The next prime is 11666001101597. The reversal of 11666001101556 is 65510110066611.

It is a super-2 number, since 2×11666001101556² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62155180 + ... + 62342588.

It is an arithmetic number, because the mean of its divisors is an integer number (568391291160).

Almost surely, 2^{11666001101556} is an apocalyptic number.

It is an amenable number.

11666001101556 is an abundant number, since it is smaller than the sum of its proper divisors (15616780874124).

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

11666001101556 is a wasteful number, since it uses less digits than its factorization.

11666001101556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199224 (or 199222 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 11666001101556 in words is "eleven trillion, six hundred sixty-six billion, one million, one hundred one thousand, five hundred fifty-six".