166222427 has 8 divisors (see below), whose sum is σ = 190051296. Its totient is φ = 142414272.

The previous prime is 166222421. The next prime is 166222429. The reversal of 166222427 is 724222661.

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

It is not a de Polignac number, because 166222427 - 2¹² = 166218331 is a prime.

It is a super-4 number, since 4×166222427⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 166222393 and 166222402.

It is not an unprimeable number, because it can be changed into a prime (166222421) 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, 20573 + ... + 27489.

It is an arithmetic number, because the mean of its divisors is an integer number (23756412).

Almost surely, 2^166222427 is an apocalyptic number.

166222427 is a deficient number, since it is larger than the sum of its proper divisors (23828869).

166222427 is an equidigital number, since it uses as much as digits as its factorization.

166222427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10357.

The product of its digits is 16128, while the sum is 32.

The square root of 166222427 is about 12892.7276788118. The cubic root of 166222427 is about 549.8318240634.

The spelling of 166222427 in words is "one hundred sixty-six million, two hundred twenty-two thousand, four hundred twenty-seven".