166586158449 has 12 divisors (see below), whose sum is σ = 244702832400. Its totient is φ = 109175109144.

The previous prime is 166586158423. The next prime is 166586158493. The reversal of 166586158449 is 944851685661.

166586158449 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 8 + 6 + 1 + 584 + 49 = 666.

166586158449 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 166586158449 - 2¹³ = 166586150257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166586158499) 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 11 ways as a sum of consecutive naturals, for example, 156860259 + ... + 156861320.

It is an arithmetic number, because the mean of its divisors is an integer number (20391902700).

Almost surely, 2^166586158449 is an apocalyptic number.

It is an amenable number.

166586158449 is a deficient number, since it is larger than the sum of its proper divisors (78116673951).

166586158449 is a wasteful number, since it uses less digits than its factorization.

166586158449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313721644 (or 313721641 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 63.

The spelling of 166586158449 in words is "one hundred sixty-six billion, five hundred eighty-six million, one hundred fifty-eight thousand, four hundred forty-nine".