9665898985669 has 4 divisors (see below), whose sum is σ = 9871556410944. Its totient is φ = 9460241560396.

The previous prime is 9665898985657. The next prime is 9665898985679.

9665898985669 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 not a de Polignac number, because 9665898985669 - 2⁷ = 9665898985541 is a prime.

It is a super-2 number, since 2×9665898985669² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9665898985619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102828712567 + ... + 102828712660.

It is an arithmetic number, because the mean of its divisors is an integer number (2467889102736).

Almost surely, 2^{9665898985669} is an apocalyptic number.

It is an amenable number.

9665898985669 is a deficient number, since it is larger than the sum of its proper divisors (205657425275).

9665898985669 is a wasteful number, since it uses less digits than its factorization.

9665898985669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205657425274.

The product of its digits is 108839116800, while the sum is 94.

The spelling of 9665898985669 in words is "nine trillion, six hundred sixty-five billion, eight hundred ninety-eight million, nine hundred eighty-five thousand, six hundred sixty-nine".