166222127 has 16 divisors (see below), whose sum is σ = 186485760. Its totient is φ = 147403872.

The previous prime is 166222117. The next prime is 166222153. The reversal of 166222127 is 721222661.

It is a happy number.

It is not a de Polignac number, because 166222127 - 2²⁰ = 165173551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166222127.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166222117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16493 + ... + 24585.

It is an arithmetic number, because the mean of its divisors is an integer number (11655360).

Almost surely, 2^166222127 is an apocalyptic number.

166222127 is a deficient number, since it is larger than the sum of its proper divisors (20263633).

166222127 is a wasteful number, since it uses less digits than its factorization.

166222127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8182.

The product of its digits is 4032, while the sum is 29.

The square root of 166222127 is about 12892.7160443407. The cubic root of 166222127 is about 549.8314932825.

Adding to 166222127 its reverse (721222661), we get a palindrome (887444788).

The spelling of 166222127 in words is "one hundred sixty-six million, two hundred twenty-two thousand, one hundred twenty-seven".