9666446669 has 24 divisors (see below), whose sum is σ = 11259780000. Its totient is φ = 8269002720.

The previous prime is 9666446659. The next prime is 9666446677.

9666446669 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9666446669 - 2²⁴ = 9649669453 is a prime.

It is a super-2 number, since 2×9666446669² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9666446659) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 328442 + ... + 356660.

It is an arithmetic number, because the mean of its divisors is an integer number (469157500).

Almost surely, 2^9666446669 is an apocalyptic number.

It is an amenable number.

9666446669 is a deficient number, since it is larger than the sum of its proper divisors (1593333331).

9666446669 is a wasteful number, since it uses less digits than its factorization.

9666446669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28409 (or 28398 counting only the distinct ones).

The product of its digits is 60466176, while the sum is 62.

The square root of 9666446669 is about 98318.0892257371. The cubic root of 9666446669 is about 2130.2093491838.

The spelling of 9666446669 in words is "nine billion, six hundred sixty-six million, four hundred forty-six thousand, six hundred sixty-nine".