11666606065986 has 32 divisors (see below), whose sum is σ = 24780393834048. Its totient is φ = 3649053957120.

The previous prime is 11666606065981. The next prime is 11666606066117. The reversal of 11666606065986 is 68956060666611.

It is a super-2 number, since 2×11666606065986² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11666606065981) 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, 172743415 + ... + 172810938.

It is an arithmetic number, because the mean of its divisors is an integer number (774387307314).

Almost surely, 2^{11666606065986} is an apocalyptic number.

11666606065986 is an abundant number, since it is smaller than the sum of its proper divisors (13113787768062).

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

11666606065986 is a wasteful number, since it uses less digits than its factorization.

11666606065986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345554706.

The product of its (nonzero) digits is 100776960, while the sum is 66.

The spelling of 11666606065986 in words is "eleven trillion, six hundred sixty-six billion, six hundred six million, sixty-five thousand, nine hundred eighty-six".