11666542572056 has 32 divisors (see below), whose sum is σ = 23341496516400. Its totient is φ = 5450554851840.

The previous prime is 11666542572017. The next prime is 11666542572107. The reversal of 11666542572056 is 65027524566611.

It is a super-2 number, since 2×11666542572056² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 11666542571992 and 11666542572010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525698285 + ... + 525720476.

Almost surely, 2^{11666542572056} is an apocalyptic number.

It is an amenable number.

11666542572056 is an abundant number, since it is smaller than the sum of its proper divisors (11674953944344).

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

11666542572056 is a wasteful number, since it uses less digits than its factorization.

11666542572056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051418859 (or 1051418855 counting only the distinct ones).

The product of its (nonzero) digits is 18144000, while the sum is 56.

The spelling of 11666542572056 in words is "eleven trillion, six hundred sixty-six billion, five hundred forty-two million, five hundred seventy-two thousand, fifty-six".