19660149 has 6 divisors (see below), whose sum is σ = 28398006. Its totient is φ = 13106760.

The previous prime is 19660133. The next prime is 19660153. The reversal of 19660149 is 94106691.

19660149 is a `hidden beast` number, since 1 + 9 + 6 + 601 + 49 = 666.

It can be written as a sum of positive squares in only one way, i.e., 19580625 + 79524 = 4425^2 + 282^2 .

It is not a de Polignac number, because 19660149 - 2⁴ = 19660133 is a prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19620149) 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 5 ways as a sum of consecutive naturals, for example, 1092222 + ... + 1092239.

It is an arithmetic number, because the mean of its divisors is an integer number (4733001).

Almost surely, 2^19660149 is an apocalyptic number.

It is an amenable number.

19660149 is a deficient number, since it is larger than the sum of its proper divisors (8737857).

19660149 is a wasteful number, since it uses less digits than its factorization.

19660149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184467 (or 2184464 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 19660149 is about 4433.9766575840. The cubic root of 19660149 is about 269.8954739430.

The spelling of 19660149 in words is "nineteen million, six hundred sixty thousand, one hundred forty-nine".