9842816666 has 16 divisors (see below), whose sum is σ = 15047049888. Its totient is φ = 4827186000.

The previous prime is 9842816663. The next prime is 9842816729. The reversal of 9842816666 is 6666182489.

It is a pancake number, because a pancake can be divided into 9842816666 parts by 140305 straight cuts.

It is not an unprimeable number, because it can be changed into a prime (9842816663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435341 + ... + 457391.

It is an arithmetic number, because the mean of its divisors is an integer number (940440618).

Almost surely, 2^9842816666 is an apocalyptic number.

9842816666 is a deficient number, since it is larger than the sum of its proper divisors (5204233222).

9842816666 is a wasteful number, since it uses less digits than its factorization.

9842816666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26317.

The product of its digits is 5971968, while the sum is 56.

The square root of 9842816666 is about 99210.9704921789. The cubic root of 9842816666 is about 2143.0869841165.

The spelling of 9842816666 in words is "nine billion, eight hundred forty-two million, eight hundred sixteen thousand, six hundred sixty-six".