166850018517 has 32 divisors (see below), whose sum is σ = 273861000448. Its totient is φ = 87990852096.

The previous prime is 166850018459. The next prime is 166850018519. The reversal of 166850018517 is 715810058661.

It is a happy number.

166850018517 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 166850018517 - 2¹¹ = 166850016469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166850018519) 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 31 ways as a sum of consecutive naturals, for example, 1336083 + ... + 1455615.

It is an arithmetic number, because the mean of its divisors is an integer number (8558156264).

Almost surely, 2^166850018517 is an apocalyptic number.

It is an amenable number.

166850018517 is a deficient number, since it is larger than the sum of its proper divisors (107010981931).

166850018517 is a wasteful number, since it uses less digits than its factorization.

166850018517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124669.

The product of its (nonzero) digits is 403200, while the sum is 48.

The spelling of 166850018517 in words is "one hundred sixty-six billion, eight hundred fifty million, eighteen thousand, five hundred seventeen".