166578736149 has 48 divisors (see below), whose sum is σ = 277766604544. Its totient is φ = 94226457600.

The previous prime is 166578736147. The next prime is 166578736153. The reversal of 166578736149 is 941637875661.

166578736149 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 7 + 8 + 7 + 3 + 614 + 9 = 666.

166578736149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166578736149 - 2¹ = 166578736147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166578736147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31540389 + ... + 31545669.

Almost surely, 2^166578736149 is an apocalyptic number.

It is an amenable number.

166578736149 is a deficient number, since it is larger than the sum of its proper divisors (111187868395).

166578736149 is a wasteful number, since it uses less digits than its factorization.

166578736149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10258 (or 10255 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 166578736149 in words is "one hundred sixty-six billion, five hundred seventy-eight million, seven hundred thirty-six thousand, one hundred forty-nine".