166688355071682 has 24 divisors (see below), whose sum is σ = 368842317607296. Its totient is φ = 54380598108216.

The previous prime is 166688355071587. The next prime is 166688355071687. The reversal of 166688355071682 is 286170553886661.

It is a self number, because there is not a number n which added to its sum of digits gives 166688355071682.

It is not an unprimeable number, because it can be changed into a prime (166688355071687) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 98515575438 + ... + 98515577129.

It is an arithmetic number, because the mean of its divisors is an integer number (15368429900304).

Almost surely, 2^{166688355071682} is an apocalyptic number.

166688355071682 is an abundant number, since it is smaller than the sum of its proper divisors (202153962535614).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166688355071682 is a wasteful number, since it uses less digits than its factorization.

166688355071682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197031152622 (or 197031152619 counting only the distinct ones).

The product of its (nonzero) digits is 696729600, while the sum is 72.

The spelling of 166688355071682 in words is "one hundred sixty-six trillion, six hundred eighty-eight billion, three hundred fifty-five million, seventy-one thousand, six hundred eighty-two".