2166100443 has 24 divisors (see below), whose sum is σ = 3396044288. Its totient is φ = 1322479872.

The previous prime is 2166100411. The next prime is 2166100459. The reversal of 2166100443 is 3440016612.

2166100443 is a `hidden beast` number, since 2 + 1 + 6 + 610 + 0 + 4 + 43 = 666.

It is not a de Polignac number, because 2166100443 - 2⁵ = 2166100411 is a prime.

It is a super-2 number, since 2×2166100443² = 9383982258329592498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2166100493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58030 + ... + 87747.

Almost surely, 2^2166100443 is an apocalyptic number.

2166100443 is a deficient number, since it is larger than the sum of its proper divisors (1229943845).

2166100443 is a wasteful number, since it uses less digits than its factorization.

2166100443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145923 (or 145920 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 2166100443 is about 46541.3841972926. The cubic root of 2166100443 is about 1293.8766151514.

The spelling of 2166100443 in words is "two billion, one hundred sixty-six million, one hundred thousand, four hundred forty-three".