8166868423 has 4 divisors (see below), whose sum is σ = 9333563920. Its totient is φ = 7000172928.

The previous prime is 8166868387. The next prime is 8166868469. The reversal of 8166868423 is 3248686618.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3248686618 = 2 ⋅1624343309.

It is not a de Polignac number, because 8166868423 - 2⁹ = 8166867911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8166868483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 583347738 + ... + 583347751.

It is an arithmetic number, because the mean of its divisors is an integer number (2333390980).

Almost surely, 2^8166868423 is an apocalyptic number.

8166868423 is a deficient number, since it is larger than the sum of its proper divisors (1166695497).

8166868423 is a wasteful number, since it uses less digits than its factorization.

8166868423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166695496.

The product of its digits is 2654208, while the sum is 52.

The square root of 8166868423 is about 90370.7276887821. The cubic root of 8166868423 is about 2013.8101226841.

The spelling of 8166868423 in words is "eight billion, one hundred sixty-six million, eight hundred sixty-eight thousand, four hundred twenty-three".