8166723 has 4 divisors (see below), whose sum is σ = 10888968. Its totient is φ = 5444480.

The previous prime is 8166659. The next prime is 8166727. The reversal of 8166723 is 3276618.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8166723 - 2⁶ = 8166659 is a prime.

8166723 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (8166727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1361118 + ... + 1361123.

It is an arithmetic number, because the mean of its divisors is an integer number (2722242).

Almost surely, 2^8166723 is an apocalyptic number.

8166723 is a deficient number, since it is larger than the sum of its proper divisors (2722245).

8166723 is a wasteful number, since it uses less digits than its factorization.

8166723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2722244.

The product of its digits is 12096, while the sum is 33.

The square root of 8166723 is about 2857.7478895102. The cubic root of 8166723 is about 201.3798169671.

The spelling of 8166723 in words is "eight million, one hundred sixty-six thousand, seven hundred twenty-three".