16661505006 has 16 divisors (see below), whose sum is σ = 37025566800. Its totient is φ = 5553834984.

The previous prime is 16661504983. The next prime is 16661505017. The reversal of 16661505006 is 60050516661.

It is a Curzon number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 154273141 + ... + 154273248.

It is an arithmetic number, because the mean of its divisors is an integer number (2314097925).

Almost surely, 2^16661505006 is an apocalyptic number.

16661505006 is an abundant number, since it is smaller than the sum of its proper divisors (20364061794).

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

16661505006 is a wasteful number, since it uses less digits than its factorization.

16661505006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308546400 (or 308546394 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The spelling of 16661505006 in words is "sixteen billion, six hundred sixty-one million, five hundred five thousand, six".