15505566651066 has 32 divisors (see below), whose sum is σ = 31129297738560. Its totient is φ = 5148831702656.

The previous prime is 15505566651053. The next prime is 15505566651089. The reversal of 15505566651066 is 66015666550551.

It is a junction number, because it is equal to n+sod(n) for n = 15505566650997 and 15505566651015.

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 15 ways as a sum of consecutive naturals, for example, 17213125 + ... + 18091511.

It is an arithmetic number, because the mean of its divisors is an integer number (972790554330).

Almost surely, 2^{15505566651066} is an apocalyptic number.

15505566651066 is an abundant number, since it is smaller than the sum of its proper divisors (15623731087494).

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

15505566651066 is a wasteful number, since it uses less digits than its factorization.

15505566651066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889598.

The product of its (nonzero) digits is 24300000, while the sum is 57.

The spelling of 15505566651066 in words is "fifteen trillion, five hundred five billion, five hundred sixty-six million, six hundred fifty-one thousand, sixty-six".