9999766422 has 48 divisors (see below), whose sum is σ = 22227856560. Its totient is φ = 3247084800.

The previous prime is 9999766421. The next prime is 9999766423. The reversal of 9999766422 is 2246679999.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9999766421) and next prime (9999766423).

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 9999766422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999766421) 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 23 ways as a sum of consecutive naturals, for example, 500154 + ... + 519762.

It is an arithmetic number, because the mean of its divisors is an integer number (463080345).

Almost surely, 2^9999766422 is an apocalyptic number.

9999766422 is an abundant number, since it is smaller than the sum of its proper divisors (12228090138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9999766422 is a wasteful number, since it uses less digits than its factorization.

9999766422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20349 (or 20346 counting only the distinct ones).

The product of its digits is 26453952, while the sum is 63.

The square root of 9999766422 is about 99998.8321031801. The cubic root of 9999766422 is about 2154.4179156164.

The spelling of 9999766422 in words is "nine billion, nine hundred ninety-nine million, seven hundred sixty-six thousand, four hundred twenty-two".