9664444669 has 32 divisors (see below), whose sum is σ = 10910039040. Its totient is φ = 8486755200.

The previous prime is 9664444663. The next prime is 9664444693.

9664444669 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9664444669 - 2⁵ = 9664444637 is a prime.

It is a super-2 number, since 2×9664444669² (a number of 21 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 (9664444663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10204854 + ... + 10205800.

It is an arithmetic number, because the mean of its divisors is an integer number (340938720).

Almost surely, 2^9664444669 is an apocalyptic number.

It is an amenable number.

9664444669 is a deficient number, since it is larger than the sum of its proper divisors (1245594371).

9664444669 is a wasteful number, since it uses less digits than its factorization.

9664444669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1281.

The product of its digits is 26873856, while the sum is 58.

The square root of 9664444669 is about 98307.9074591663. The cubic root of 9664444669 is about 2130.0622777826.

The spelling of 9664444669 in words is "nine billion, six hundred sixty-four million, four hundred forty-four thousand, six hundred sixty-nine".