16506665166 has 16 divisors (see below), whose sum is σ = 33014660688. Its totient is φ = 5502000000.

The previous prime is 16506665081. The next prime is 16506665177. The reversal of 16506665166 is 66156660561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 188326 + ... + 261686.

It is an arithmetic number, because the mean of its divisors is an integer number (2063416293).

Almost surely, 2^16506665166 is an apocalyptic number.

16506665166 is an abundant number, since it is smaller than the sum of its proper divisors (16507995522).

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

16506665166 is a wasteful number, since it uses less digits than its factorization.

16506665166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110867.

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

The spelling of 16506665166 in words is "sixteen billion, five hundred six million, six hundred sixty-five thousand, one hundred sixty-six".