16655661066 has 32 divisors (see below), whose sum is σ = 36527940288. Its totient is φ = 5021015040.

The previous prime is 16655661023. The next prime is 16655661067. The reversal of 16655661066 is 66016655661.

It is a super-2 number, since 2×16655661066² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16655661067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 641041 + ... + 666516.

It is an arithmetic number, because the mean of its divisors is an integer number (1141498134).

Almost surely, 2^16655661066 is an apocalyptic number.

16655661066 is an abundant number, since it is smaller than the sum of its proper divisors (19872279222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16655661066 is a wasteful number, since it uses less digits than its factorization.

16655661066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307766.

The product of its (nonzero) digits is 1166400, while the sum is 48.

The spelling of 16655661066 in words is "sixteen billion, six hundred fifty-five million, six hundred sixty-one thousand, sixty-six".