9666755473 has 2 divisors, whose sum is σ = 9666755474. Its totient is φ = 9666755472.

The previous prime is 9666755453. The next prime is 9666755479. The reversal of 9666755473 is 3745576669.

It is a happy number.

9666755473 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9542945344 + 123810129 = 97688^2 + 11127^2 .

It is a cyclic number.

It is not a de Polignac number, because 9666755473 - 2⁹ = 9666754961 is a prime.

It is a super-2 number, since 2×9666755473² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9666755479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4833377736 + 4833377737.

It is an arithmetic number, because the mean of its divisors is an integer number (4833377737).

Almost surely, 2^9666755473 is an apocalyptic number.

It is an amenable number.

9666755473 is a deficient number, since it is larger than the sum of its proper divisors (1).

9666755473 is an equidigital number, since it uses as much as digits as its factorization.

9666755473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28576800, while the sum is 58.

The square root of 9666755473 is about 98319.6596464817. The cubic root of 9666755473 is about 2130.2320328091.

The spelling of 9666755473 in words is "nine billion, six hundred sixty-six million, seven hundred fifty-five thousand, four hundred seventy-three".