5606006661 has 12 divisors (see below), whose sum is σ = 8115290092. Its totient is φ = 3729157056.

The previous prime is 5606006633. The next prime is 5606006701. The reversal of 5606006661 is 1666006065.

It can be written as a sum of positive squares in 2 ways, for example, as 2480637636 + 3125369025 = 49806^2 + 55905^2 .

It is not a de Polignac number, because 5606006661 - 2⁹ = 5606006149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5606006261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 677386 + ... + 685611.

Almost surely, 2^5606006661 is an apocalyptic number.

It is an amenable number.

5606006661 is a deficient number, since it is larger than the sum of its proper divisors (2509283431).

5606006661 is a wasteful number, since it uses less digits than its factorization.

5606006661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363460 (or 1363457 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 5606006661 is about 74873.2706711814. The cubic root of 5606006661 is about 1776.4426978419.

The spelling of 5606006661 in words is "five billion, six hundred six million, six thousand, six hundred sixty-one".