16665626015556 has 36 divisors (see below), whose sum is σ = 45235270615248. Its totient is φ = 4761607432848.

The previous prime is 16665626015531. The next prime is 16665626015561. The reversal of 16665626015556 is 65551062656661.

It is a self number, because there is not a number n which added to its sum of digits gives 16665626015556.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14171450106 + ... + 14171451281.

It is an arithmetic number, because the mean of its divisors is an integer number (1256535294868).

Almost surely, 2^{16665626015556} is an apocalyptic number.

It is an amenable number.

16665626015556 is an abundant number, since it is smaller than the sum of its proper divisors (28569644599692).

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

16665626015556 is a wasteful number, since it uses less digits than its factorization.

16665626015556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28342901408 (or 28342901399 counting only the distinct ones).

The product of its (nonzero) digits is 58320000, while the sum is 60.

The spelling of 16665626015556 in words is "sixteen trillion, six hundred sixty-five billion, six hundred twenty-six million, fifteen thousand, five hundred fifty-six".