8166118813 has 4 divisors (see below), whose sum is σ = 8595914560. Its totient is φ = 7736323068.

The previous prime is 8166118799. The next prime is 8166118819. The reversal of 8166118813 is 3188116618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8166118813 - 2²¹ = 8164021661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8166118813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8166118819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214897845 + ... + 214897882.

It is an arithmetic number, because the mean of its divisors is an integer number (2148978640).

Almost surely, 2^8166118813 is an apocalyptic number.

It is an amenable number.

8166118813 is a deficient number, since it is larger than the sum of its proper divisors (429795747).

8166118813 is a wasteful number, since it uses less digits than its factorization.

8166118813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429795746.

The product of its digits is 55296, while the sum is 43.

The square root of 8166118813 is about 90366.5801776298. The cubic root of 8166118813 is about 2013.7485071290.

The spelling of 8166118813 in words is "eight billion, one hundred sixty-six million, one hundred eighteen thousand, eight hundred thirteen".