9666839007 has 12 divisors (see below), whose sum is σ = 15957956560. Its totient is φ = 5523907968.

The previous prime is 9666838999. The next prime is 9666839009. The reversal of 9666839007 is 7009386669.

It is a happy number.

It is not a de Polignac number, because 9666839007 - 2³ = 9666838999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9666839009) 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 11 ways as a sum of consecutive naturals, for example, 76720882 + ... + 76721007.

Almost surely, 2^9666839007 is an apocalyptic number.

9666839007 is a deficient number, since it is larger than the sum of its proper divisors (6291117553).

9666839007 is a wasteful number, since it uses less digits than its factorization.

9666839007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153441902 (or 153441899 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 54.

The square root of 9666839007 is about 98320.0844537880. The cubic root of 9666839007 is about 2130.2381688317.

The spelling of 9666839007 in words is "nine billion, six hundred sixty-six million, eight hundred thirty-nine thousand, seven".