9916666199 has 6 divisors (see below), whose sum is σ = 10900137360. Its totient is φ = 9015150980.

The previous prime is 9916666157. The next prime is 9916666213.

9916666199 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9916666199 - 2¹² = 9916662103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9916666139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40977839 + ... + 40978080.

It is an arithmetic number, because the mean of its divisors is an integer number (1816689560).

Almost surely, 2^9916666199 is an apocalyptic number.

9916666199 is a deficient number, since it is larger than the sum of its proper divisors (983471161).

9916666199 is a wasteful number, since it uses less digits than its factorization.

9916666199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81955941 (or 81955930 counting only the distinct ones).

The product of its digits is 8503056, while the sum is 62.

The square root of 9916666199 is about 99582.4592937933. The cubic root of 9916666199 is about 2148.4334143368.

The spelling of 9916666199 in words is "nine billion, nine hundred sixteen million, six hundred sixty-six thousand, one hundred ninety-nine".