9866666689 has 8 divisors (see below), whose sum is σ = 10766070432. Its totient is φ = 8967668640.

The previous prime is 9866666683. The next prime is 9866666699.

9866666689 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9866666689 - 2¹³ = 9866658497 is a prime.

It is a super-2 number, since 2×9866666689² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9866666683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49404 + ... + 148909.

It is an arithmetic number, because the mean of its divisors is an integer number (1345758804).

Almost surely, 2^9866666689 is an apocalyptic number.

It is an amenable number.

9866666689 is a deficient number, since it is larger than the sum of its proper divisors (899403743).

9866666689 is a wasteful number, since it uses less digits than its factorization.

9866666689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202847.

The product of its digits is 241864704, while the sum is 70.

The square root of 9866666689 is about 99331.0962840942. The cubic root of 9866666689 is about 2144.8165515617.

The spelling of 9866666689 in words is "nine billion, eight hundred sixty-six million, six hundred sixty-six thousand, six hundred eighty-nine".