999911888116666 has 8 divisors (see below), whose sum is σ = 1714134665342880. Its totient is φ = 428533666335708.

The previous prime is 999911888116657. The next prime is 999911888116681. The reversal of 999911888116666 is 666611888119999.

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

999911888116666 is a strobogrammatic number because it is the same when read upside-down.

It is a zygodrome in base 10.

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, 35711138861296 + ... + 35711138861323.

It is an arithmetic number, because the mean of its divisors is an integer number (214266833167860).

Almost surely, 2^{999911888116666} is an apocalyptic number.

999911888116666 is a deficient number, since it is larger than the sum of its proper divisors (714222777226214).

999911888116666 is a wasteful number, since it uses less digits than its factorization.

999911888116666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71422277722628.

The product of its digits is 4353564672, while the sum is 88.

The spelling of 999911888116666 in words is "nine hundred ninety-nine trillion, nine hundred eleven billion, eight hundred eighty-eight million, one hundred sixteen thousand, six hundred sixty-six".