9666666669 has 32 divisors (see below), whose sum is σ = 14322170880. Its totient is φ = 5750236800.

The previous prime is 9666666623. The next prime is 9666666683.

9666666669 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9666666669 - 2¹⁵ = 9666633901 is a prime.

It is a super-2 number, since 2×9666666669² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9666666169) 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 31 ways as a sum of consecutive naturals, for example, 613512 + ... + 629070.

It is an arithmetic number, because the mean of its divisors is an integer number (447567840).

Almost surely, 2^9666666669 is an apocalyptic number.

It is an amenable number.

9666666669 is a deficient number, since it is larger than the sum of its proper divisors (4655504211).

9666666669 is a wasteful number, since it uses less digits than its factorization.

9666666669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15921.

The product of its digits is 136048896, while the sum is 66.

The square root of 9666666669 is about 98319.2080368836. The cubic root of 9666666669 is about 2130.2255096378.

The spelling of 9666666669 in words is "nine billion, six hundred sixty-six million, six hundred sixty-six thousand, six hundred sixty-nine".