8166427 has 4 divisors (see below), whose sum is σ = 8175616. Its totient is φ = 8157240.

The previous prime is 8166407. The next prime is 8166439. The reversal of 8166427 is 7246618.

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 8166427 - 2¹⁹ = 7642139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8166392 and 8166401.

It is not an unprimeable number, because it can be changed into a prime (8166407) 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, 3099 + ... + 5092.

It is an arithmetic number, because the mean of its divisors is an integer number (2043904).

Almost surely, 2^8166427 is an apocalyptic number.

8166427 is a deficient number, since it is larger than the sum of its proper divisors (9189).

8166427 is an equidigital number, since it uses as much as digits as its factorization.

8166427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9188.

The product of its digits is 16128, while the sum is 34.

The square root of 8166427 is about 2857.6961000078. The cubic root of 8166427 is about 201.3773839575.

The spelling of 8166427 in words is "eight million, one hundred sixty-six thousand, four hundred twenty-seven".