16566354472004 has 12 divisors (see below), whose sum is σ = 29278161122028. Its totient is φ = 8201165580000.

The previous prime is 16566354471983. The next prime is 16566354472021. The reversal of 16566354472004 is 40027445366561.

It can be written as a sum of positive squares in 2 ways, for example, as 14344323012100 + 2222031459904 = 3787390^2 + 1490648^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20502913547 + ... + 20502914354.

It is an arithmetic number, because the mean of its divisors is an integer number (2439846760169).

Almost surely, 2^{16566354472004} is an apocalyptic number.

It is an amenable number.

16566354472004 is a deficient number, since it is larger than the sum of its proper divisors (12711806650024).

16566354472004 is a wasteful number, since it uses less digits than its factorization.

16566354472004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41005828006 (or 41005828004 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 53.

The spelling of 16566354472004 in words is "sixteen trillion, five hundred sixty-six billion, three hundred fifty-four million, four hundred seventy-two thousand, four".