9966666633 has 16 divisors (see below), whose sum is σ = 16567965696. Its totient is φ = 5177489040.

The previous prime is 9966666631. The next prime is 9966666637. The reversal of 9966666633 is 3366666699.

It is not a de Polignac number, because 9966666633 - 2¹ = 9966666631 is a prime.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9966666631) 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, 21572641 + ... + 21573102.

It is an arithmetic number, because the mean of its divisors is an integer number (1035497856).

Almost surely, 2^9966666633 is an apocalyptic number.

It is an amenable number.

9966666633 is a deficient number, since it is larger than the sum of its proper divisors (6601299063).

9966666633 is a wasteful number, since it uses less digits than its factorization.

9966666633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43145764.

The product of its digits is 34012224, while the sum is 60.

The square root of 9966666633 is about 99833.1940438650. The cubic root of 9966666633 is about 2152.0382065540.

It can be divided in two parts, 99666666 and 33, that added together give a palindrome (99666699).

The spelling of 9966666633 in words is "nine billion, nine hundred sixty-six million, six hundred sixty-six thousand, six hundred thirty-three".