166122445 has 8 divisors (see below), whose sum is σ = 208014336. Its totient is φ = 127119696.

The previous prime is 166122421. The next prime is 166122449. The reversal of 166122445 is 544221661.

It is a happy number.

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 166122445 - 2¹⁷ = 165991373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166122449) 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 7 ways as a sum of consecutive naturals, for example, 722157 + ... + 722386.

It is an arithmetic number, because the mean of its divisors is an integer number (26001792).

Almost surely, 2^166122445 is an apocalyptic number.

It is an amenable number.

166122445 is a deficient number, since it is larger than the sum of its proper divisors (41891891).

166122445 is a wasteful number, since it uses less digits than its factorization.

166122445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1444571.

The product of its digits is 11520, while the sum is 31.

The square root of 166122445 is about 12888.8496383502. The cubic root of 166122445 is about 549.7215615432.

The spelling of 166122445 in words is "one hundred sixty-six million, one hundred twenty-two thousand, four hundred forty-five".