2166448149 has 24 divisors (see below), whose sum is σ = 3208849280. Its totient is φ = 1408036608.

The previous prime is 2166448147. The next prime is 2166448157. The reversal of 2166448149 is 9418446612.

2166448149 is a `hidden beast` number, since 2 + 1 + 66 + 448 + 149 = 666.

It is not a de Polignac number, because 2166448149 - 2¹ = 2166448147 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 (2166448147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39972 + ... + 77010.

Almost surely, 2^2166448149 is an apocalyptic number.

It is an amenable number.

2166448149 is a deficient number, since it is larger than the sum of its proper divisors (1042401131).

2166448149 is a wasteful number, since it uses less digits than its factorization.

2166448149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37209 (or 37206 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 2166448149 is about 46545.1194971073. The cubic root of 2166448149 is about 1293.9458431803.

The spelling of 2166448149 in words is "two billion, one hundred sixty-six million, four hundred forty-eight thousand, one hundred forty-nine".