1806166227 has 4 divisors (see below), whose sum is σ = 2408221640. Its totient is φ = 1204110816.

The previous prime is 1806166217. The next prime is 1806166247. The reversal of 1806166227 is 7226616081.

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

It is not a de Polignac number, because 1806166227 - 2⁸ = 1806165971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1806166217) 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 3 ways as a sum of consecutive naturals, for example, 301027702 + ... + 301027707.

It is an arithmetic number, because the mean of its divisors is an integer number (602055410).

Almost surely, 2^1806166227 is an apocalyptic number.

1806166227 is a deficient number, since it is larger than the sum of its proper divisors (602055413).

1806166227 is an equidigital number, since it uses as much as digits as its factorization.

1806166227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602055412.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 1806166227 is about 42499.0144238663. The cubic root of 1806166227 is about 1217.8278618415.

The spelling of 1806166227 in words is "one billion, eight hundred six million, one hundred sixty-six thousand, two hundred twenty-seven".