166445149 has 16 divisors (see below), whose sum is σ = 191793280. Its totient is φ = 143156160.

The previous prime is 166445101. The next prime is 166445161. The reversal of 166445149 is 941544661.

It is a cyclic number.

It is not a de Polignac number, because 166445149 - 2¹³ = 166436957 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 (166445449) 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, 9544 + ... + 20590.

It is an arithmetic number, because the mean of its divisors is an integer number (11987080).

Almost surely, 2^166445149 is an apocalyptic number.

166445149 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

166445149 is a deficient number, since it is larger than the sum of its proper divisors (25348131).

166445149 is a wasteful number, since it uses less digits than its factorization.

166445149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11140.

The product of its digits is 103680, while the sum is 40.

The square root of 166445149 is about 12901.3622924093. The cubic root of 166445149 is about 550.0772883122.

The spelling of 166445149 in words is "one hundred sixty-six million, four hundred forty-five thousand, one hundred forty-nine".