166601116001 has 8 divisors (see below), whose sum is σ = 172350532200. Its totient is φ = 160852003200.

The previous prime is 166601115959. The next prime is 166601116013. The reversal of 166601116001 is 100611106661.

It can be written as a sum of positive squares in 4 ways, for example, as 7068773776 + 159532342225 = 84076^2 + 399415^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-166601116001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is not an unprimeable number, because it can be changed into a prime (166601116501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2088551 + ... + 2166851.

It is an arithmetic number, because the mean of its divisors is an integer number (21543816525).

Almost surely, 2^166601116001 is an apocalyptic number.

It is an amenable number.

166601116001 is a deficient number, since it is larger than the sum of its proper divisors (5749416199).

166601116001 is an equidigital number, since it uses as much as digits as its factorization.

166601116001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151699.

The product of its (nonzero) digits is 1296, while the sum is 29.

The spelling of 166601116001 in words is "one hundred sixty-six billion, six hundred one million, one hundred sixteen thousand, one".