166668536698 has 4 divisors (see below), whose sum is σ = 250002805050. Its totient is φ = 83334268348.

The previous prime is 166668536687. The next prime is 166668536717. The reversal of 166668536698 is 896635866661.

166668536698 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 140420324529 + 26248212169 = 374727^2 + 162013^2 .

It is a super-2 number, since 2×166668536698² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 41667134173 + ... + 41667134176.

Almost surely, 2^166668536698 is an apocalyptic number.

166668536698 is a deficient number, since it is larger than the sum of its proper divisors (83334268352).

166668536698 is an equidigital number, since it uses as much as digits as its factorization.

166668536698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83334268351.

The product of its digits is 403107840, while the sum is 70.

The spelling of 166668536698 in words is "one hundred sixty-six billion, six hundred sixty-eight million, five hundred thirty-six thousand, six hundred ninety-eight".