5604395666 has 16 divisors (see below), whose sum is σ = 8567749080. Its totient is φ = 2748988800.

The previous prime is 5604395651. The next prime is 5604395677. The reversal of 5604395666 is 6665934065.

It can be written as a sum of positive squares in 4 ways, for example, as 5458106641 + 146289025 = 73879^2 + 12095^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105251 + ... + 149286.

Almost surely, 2^5604395666 is an apocalyptic number.

5604395666 is a deficient number, since it is larger than the sum of its proper divisors (2963353414).

5604395666 is a wasteful number, since it uses less digits than its factorization.

5604395666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254749.

The product of its (nonzero) digits is 3499200, while the sum is 50.

The square root of 5604395666 is about 74862.5117532133. The cubic root of 5604395666 is about 1776.2725164242.

The spelling of 5604395666 in words is "five billion, six hundred four million, three hundred ninety-five thousand, six hundred sixty-six".