166422427 has 8 divisors (see below), whose sum is σ = 172451840. Its totient is φ = 160491240.

The previous prime is 166422397. The next prime is 166422433. The reversal of 166422427 is 724224661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166422427 - 2²⁷ = 32204699 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166422392 and 166422401.

It is not an unprimeable number, because it can be changed into a prime (166422467) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21099 + ... + 27892.

It is an arithmetic number, because the mean of its divisors is an integer number (21556480).

Almost surely, 2^166422427 is an apocalyptic number.

166422427 is a deficient number, since it is larger than the sum of its proper divisors (6029413).

166422427 is an equidigital number, since it uses as much as digits as its factorization.

166422427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49113.

The product of its digits is 32256, while the sum is 34.

The square root of 166422427 is about 12900.4816576746. The cubic root of 166422427 is about 550.0522561919.

The spelling of 166422427 in words is "one hundred sixty-six million, four hundred twenty-two thousand, four hundred twenty-seven".