8166397813 has 8 divisors (see below), whose sum is σ = 9338934528. Its totient is φ = 6995338224.

The previous prime is 8166397787. The next prime is 8166397823. The reversal of 8166397813 is 3187936618.

8166397813 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-8166397813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8166397823) 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, 357406 + ... + 379567.

It is an arithmetic number, because the mean of its divisors is an integer number (1167366816).

Almost surely, 2^8166397813 is an apocalyptic number.

It is an amenable number.

8166397813 is a deficient number, since it is larger than the sum of its proper divisors (1172536715).

8166397813 is a wasteful number, since it uses less digits than its factorization.

8166397813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738563.

The product of its digits is 1306368, while the sum is 52.

The square root of 8166397813 is about 90368.1238767299. The cubic root of 8166397813 is about 2013.7714404811.

The spelling of 8166397813 in words is "eight billion, one hundred sixty-six million, three hundred ninety-seven thousand, eight hundred thirteen".