8166549999 has 32 divisors (see below), whose sum is σ = 11561679360. Its totient is φ = 5113065600.

The previous prime is 8166549991. The next prime is 8166550013. The reversal of 8166549999 is 9999456618.

It is not a de Polignac number, because 8166549999 - 2³ = 8166549991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8166549991) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4387329 + ... + 4389189.

It is an arithmetic number, because the mean of its divisors is an integer number (361302480).

Almost surely, 2^8166549999 is an apocalyptic number.

8166549999 is a deficient number, since it is larger than the sum of its proper divisors (3395129361).

8166549999 is a wasteful number, since it uses less digits than its factorization.

8166549999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2511.

The product of its digits is 37791360, while the sum is 66.

The square root of 8166549999 is about 90368.9659064438. The cubic root of 8166549999 is about 2013.7839497059.

The spelling of 8166549999 in words is "eight billion, one hundred sixty-six million, five hundred forty-nine thousand, nine hundred ninety-nine".