8166399845 has 8 divisors (see below), whose sum is σ = 9800812320. Its totient is φ = 6532364880.

The previous prime is 8166399841. The next prime is 8166399853. The reversal of 8166399845 is 5489936618.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8166399845 - 2² = 8166399841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8166399841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44375 + ... + 135284.

It is an arithmetic number, because the mean of its divisors is an integer number (1225101540).

Almost surely, 2^8166399845 is an apocalyptic number.

It is an amenable number.

8166399845 is a deficient number, since it is larger than the sum of its proper divisors (1634412475).

8166399845 is a wasteful number, since it uses less digits than its factorization.

8166399845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188755.

The product of its digits is 11197440, while the sum is 59.

The square root of 8166399845 is about 90368.1351196316. The cubic root of 8166399845 is about 2013.7716075063.

The spelling of 8166399845 in words is "eight billion, one hundred sixty-six million, three hundred ninety-nine thousand, eight hundred forty-five".