16661052747266 has 32 divisors (see below), whose sum is σ = 26323271784000. Its totient is φ = 7887175208640.

The previous prime is 16661052747217. The next prime is 16661052747271. The reversal of 16661052747266 is 66274725016661.

It is a happy number.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 484583396 + ... + 484617776.

It is an arithmetic number, because the mean of its divisors is an integer number (822602243250).

Almost surely, 2^{16661052747266} is an apocalyptic number.

16661052747266 is a deficient number, since it is larger than the sum of its proper divisors (9662219036734).

16661052747266 is a wasteful number, since it uses less digits than its factorization.

16661052747266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41954.

The product of its (nonzero) digits is 30481920, while the sum is 59.

The spelling of 16661052747266 in words is "sixteen trillion, six hundred sixty-one billion, fifty-two million, seven hundred forty-seven thousand, two hundred sixty-six".