2166116998 has 4 divisors (see below), whose sum is σ = 3249175500. Its totient is φ = 1083058498.

The previous prime is 2166116993. The next prime is 2166117013. The reversal of 2166116998 is 8996116612.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166116993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541529248 + ... + 541529251.

It is an arithmetic number, because the mean of its divisors is an integer number (812293875).

Almost surely, 2^2166116998 is an apocalyptic number.

2166116998 is a deficient number, since it is larger than the sum of its proper divisors (1083058502).

2166116998 is a wasteful number, since it uses less digits than its factorization.

2166116998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083058501.

The product of its digits is 279936, while the sum is 49.

The square root of 2166116998 is about 46541.5620494199. The cubic root of 2166116998 is about 1293.8799114086.

The spelling of 2166116998 in words is "two billion, one hundred sixty-six million, one hundred sixteen thousand, nine hundred ninety-eight".