166541027 has 4 divisors (see below), whose sum is σ = 176337576. Its totient is φ = 156744480.

The previous prime is 166541017. The next prime is 166541093. The reversal of 166541027 is 720145661.

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 166541027 - 2⁶ = 166540963 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166540984 and 166541002.

It is not an unprimeable number, because it can be changed into a prime (166541017) 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, 4898249 + ... + 4898282.

It is an arithmetic number, because the mean of its divisors is an integer number (44084394).

Almost surely, 2^166541027 is an apocalyptic number.

166541027 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

166541027 is a deficient number, since it is larger than the sum of its proper divisors (9796549).

166541027 is an equidigital number, since it uses as much as digits as its factorization.

166541027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9796548.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 166541027 is about 12905.0775666014. The cubic root of 166541027 is about 550.1828890402.

Adding to 166541027 its reverse (720145661), we get a palindrome (886686688).

The spelling of 166541027 in words is "one hundred sixty-six million, five hundred forty-one thousand, twenty-seven".