9666469991 has 2 divisors, whose sum is σ = 9666469992. Its totient is φ = 9666469990.

The previous prime is 9666469951. The next prime is 9666469997. The reversal of 9666469991 is 1999646669.

It is a strong prime.

It is an emirp because it is prime and its reverse (1999646669) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9666469991 - 2⁶ = 9666469927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9666469997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4833234995 + 4833234996.

It is an arithmetic number, because the mean of its divisors is an integer number (4833234996).

Almost surely, 2^9666469991 is an apocalyptic number.

9666469991 is a deficient number, since it is larger than the sum of its proper divisors (1).

9666469991 is an equidigital number, since it uses as much as digits as its factorization.

9666469991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34012224, while the sum is 65.

The square root of 9666469991 is about 98318.2078304929. The cubic root of 9666469991 is about 2130.2110623504.

The spelling of 9666469991 in words is "nine billion, six hundred sixty-six million, four hundred sixty-nine thousand, nine hundred ninety-one".