9910665773 has 2 divisors, whose sum is σ = 9910665774. Its totient is φ = 9910665772.

The previous prime is 9910665767. The next prime is 9910665781. The reversal of 9910665773 is 3775660199.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5885651524 + 4025014249 = 76718^2 + 63443^2 .

It is a cyclic number.

It is not a de Polignac number, because 9910665773 - 2¹⁰ = 9910664749 is a prime.

It is a super-2 number, since 2×9910665773² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9910667773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4955332886 + 4955332887.

It is an arithmetic number, because the mean of its divisors is an integer number (4955332887).

Almost surely, 2^9910665773 is an apocalyptic number.

It is an amenable number.

9910665773 is a deficient number, since it is larger than the sum of its proper divisors (1).

9910665773 is an equidigital number, since it uses as much as digits as its factorization.

9910665773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2143260, while the sum is 53.

The square root of 9910665773 is about 99552.3268085684. The cubic root of 9910665773 is about 2147.9999986273. Note that the first 5 decimals are identical.

The spelling of 9910665773 in words is "nine billion, nine hundred ten million, six hundred sixty-five thousand, seven hundred seventy-three".