2118666163 has 4 divisors (see below), whose sum is σ = 2129758848. Its totient is φ = 2107573480.

The previous prime is 2118666133. The next prime is 2118666169. The reversal of 2118666163 is 3616668112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2118666163 - 2¹³ = 2118657971 is a prime.

It is a super-2 number, since 2×2118666163² = 8977492620482285138, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2118666169) 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 3 ways as a sum of consecutive naturals, for example, 5546056 + ... + 5546437.

It is an arithmetic number, because the mean of its divisors is an integer number (532439712).

Almost surely, 2^2118666163 is an apocalyptic number.

2118666163 is a deficient number, since it is larger than the sum of its proper divisors (11092685).

2118666163 is a wasteful number, since it uses less digits than its factorization.

2118666163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11092684.

The product of its digits is 62208, while the sum is 40.

The square root of 2118666163 is about 46028.9709096347. The cubic root of 2118666163 is about 1284.3621846433.

The spelling of 2118666163 in words is "two billion, one hundred eighteen million, six hundred sixty-six thousand, one hundred sixty-three".