98668666686689 has 4 divisors (see below), whose sum is σ = 107638545476400. Its totient is φ = 89698787896980.

The previous prime is 98668666686679. The next prime is 98668666686713.

98668666686689 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-98668666686689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 98668666686595 and 98668666686604.

It is not an unprimeable number, because it can be changed into a prime (98668666686679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4484939394839 + ... + 4484939394860.

It is an arithmetic number, because the mean of its divisors is an integer number (26909636369100).

Almost surely, 2^{98668666686689} is an apocalyptic number.

It is an amenable number.

98668666686689 is a deficient number, since it is larger than the sum of its proper divisors (8969878789711).

98668666686689 is a wasteful number, since it uses less digits than its factorization.

98668666686689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8969878789710.

The product of its digits is 557256278016, while the sum is 98.

The spelling of 98668666686689 in words is "ninety-eight trillion, six hundred sixty-eight billion, six hundred sixty-six million, six hundred eighty-six thousand, six hundred eighty-nine".