5606605666 has 4 divisors (see below), whose sum is σ = 8409908502. Its totient is φ = 2803302832.

The previous prime is 5606605643. The next prime is 5606605679. The reversal of 5606605666 is 6665066065.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3894384025 + 1712221641 = 62405^2 + 41379^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1401651415 + ... + 1401651418.

Almost surely, 2^5606605666 is an apocalyptic number.

5606605666 is a deficient number, since it is larger than the sum of its proper divisors (2803302836).

5606605666 is a wasteful number, since it uses less digits than its factorization.

5606605666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803302835.

The product of its (nonzero) digits is 1166400, while the sum is 46.

The square root of 5606605666 is about 74877.2706901100. The cubic root of 5606605666 is about 1776.5059668927.

The spelling of 5606605666 in words is "five billion, six hundred six million, six hundred five thousand, six hundred sixty-six".