9666484391 has 2 divisors, whose sum is σ = 9666484392. Its totient is φ = 9666484390.

The previous prime is 9666484379. The next prime is 9666484411. The reversal of 9666484391 is 1934846669.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9666484391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9666480391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4833242195 + 4833242196.

It is an arithmetic number, because the mean of its divisors is an integer number (4833242196).

Almost surely, 2^9666484391 is an apocalyptic number.

9666484391 is a deficient number, since it is larger than the sum of its proper divisors (1).

9666484391 is an equidigital number, since it uses as much as digits as its factorization.

9666484391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6718464, while the sum is 56.

The square root of 9666484391 is about 98318.2810620690. The cubic root of 9666484391 is about 2130.2121201314.

The spelling of 9666484391 in words is "nine billion, six hundred sixty-six million, four hundred eighty-four thousand, three hundred ninety-one".