166717183871055 has 16 divisors (see below), whose sum is σ = 278345211333120. Its totient is φ = 85049925684768.

The previous prime is 166717183871053. The next prime is 166717183871149. The reversal of 166717183871055 is 550178381717661.

166717183871055 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166717183871055 - 2¹ = 166717183871053 is a prime.

It is a super-2 number, since 2×166717183871055² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166717183871053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241619106715 + ... + 241619107404.

It is an arithmetic number, because the mean of its divisors is an integer number (17396575708320).

Almost surely, 2^{166717183871055} is an apocalyptic number.

166717183871055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

166717183871055 is a deficient number, since it is larger than the sum of its proper divisors (111628027462065).

166717183871055 is a wasteful number, since it uses less digits than its factorization.

166717183871055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483238214150.

The product of its (nonzero) digits is 59270400, while the sum is 66.

The spelling of 166717183871055 in words is "one hundred sixty-six trillion, seven hundred seventeen billion, one hundred eighty-three million, eight hundred seventy-one thousand, fifty-five".