9665403667 has 4 divisors (see below), whose sum is σ = 9665651520. Its totient is φ = 9665155816.

The previous prime is 9665403653. The next prime is 9665403677. The reversal of 9665403667 is 7663045669.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9665403667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9665403637) 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 3 ways as a sum of consecutive naturals, for example, 51208 + ... + 148165.

It is an arithmetic number, because the mean of its divisors is an integer number (2416412880).

Almost surely, 2^9665403667 is an apocalyptic number.

9665403667 is a deficient number, since it is larger than the sum of its proper divisors (247853).

9665403667 is a wasteful number, since it uses less digits than its factorization.

9665403667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247852.

The product of its (nonzero) digits is 4898880, while the sum is 52.

The square root of 9665403667 is about 98312.7848603629. The cubic root of 9665403667 is about 2130.1327304564.

The spelling of 9665403667 in words is "nine billion, six hundred sixty-five million, four hundred three thousand, six hundred sixty-seven".