11666155565066 has 8 divisors (see below), whose sum is σ = 17720742630720. Its totient is φ = 5759241354828.

The previous prime is 11666155565033. The next prime is 11666155565081. The reversal of 11666155565066 is 66056555166611.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11666155564996 and 11666155565014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36918213656 + ... + 36918213971.

It is an arithmetic number, because the mean of its divisors is an integer number (2215092828840).

Almost surely, 2^{11666155565066} is an apocalyptic number.

11666155565066 is a deficient number, since it is larger than the sum of its proper divisors (6054587065654).

11666155565066 is an equidigital number, since it uses as much as digits as its factorization.

11666155565066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73836427708.

The product of its (nonzero) digits is 29160000, while the sum is 59.

The spelling of 11666155565066 in words is "eleven trillion, six hundred sixty-six billion, one hundred fifty-five million, five hundred sixty-five thousand, sixty-six".