9999966101919 has 16 divisors (see below), whose sum is σ = 13357349746944. Its totient is φ = 6654622651200.

The previous prime is 9999966101911. The next prime is 9999966101953. The reversal of 9999966101919 is 9191016699999.

It is not a de Polignac number, because 9999966101919 - 2³ = 9999966101911 is a prime.

It is a super-2 number, since 2×9999966101919² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999966101911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3092734 + ... + 5437364.

It is an arithmetic number, because the mean of its divisors is an integer number (834834359184).

Almost surely, 2^{9999966101919} is an apocalyptic number.

9999966101919 is a deficient number, since it is larger than the sum of its proper divisors (3357383645025).

9999966101919 is a wasteful number, since it uses less digits than its factorization.

9999966101919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347198.

The product of its (nonzero) digits is 172186884, while the sum is 78.

The spelling of 9999966101919 in words is "nine trillion, nine hundred ninety-nine billion, nine hundred sixty-six million, one hundred one thousand, nine hundred nineteen".