9199813718666 has 8 divisors (see below), whose sum is σ = 14172685999140. Its totient is φ = 4475585052288.

The previous prime is 9199813718659. The next prime is 9199813718681. The reversal of 9199813718666 is 6668173189919.

It can be written as a sum of positive squares in 2 ways, for example, as 9185657716225 + 14156002441 = 3030785^2 + 118979^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (74), and also a Moran number because the ratio is a prime number: 124321807009 = 9199813718666 / (9 + 1 + 9 + 9 + 8 + 1 + 3 + 7 + 1 + 8 + 6 + 6 + 6).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9199813718593 and 9199813718602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62160903431 + ... + 62160903578.

Almost surely, 2^{9199813718666} is an apocalyptic number.

9199813718666 is a deficient number, since it is larger than the sum of its proper divisors (4972872280474).

9199813718666 is a wasteful number, since it uses less digits than its factorization.

9199813718666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124321807048.

The product of its digits is 211631616, while the sum is 74.

The spelling of 9199813718666 in words is "nine trillion, one hundred ninety-nine billion, eight hundred thirteen million, seven hundred eighteen thousand, six hundred sixty-six".