5566720669 has 4 divisors (see below), whose sum is σ = 5894174844. Its totient is φ = 5239266496.

The previous prime is 5566720651. The next prime is 5566720697. The reversal of 5566720669 is 9660276655.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3354147225 + 2212573444 = 57915^2 + 47038^2 .

It is a cyclic number.

It is not a de Polignac number, because 5566720669 - 2⁵ = 5566720637 is a prime.

It is a super-2 number, since 2×5566720669² = 61976758013343615122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5566720699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 163727062 + ... + 163727095.

It is an arithmetic number, because the mean of its divisors is an integer number (1473543711).

Almost surely, 2^5566720669 is an apocalyptic number.

It is an amenable number.

5566720669 is a deficient number, since it is larger than the sum of its proper divisors (327454175).

5566720669 is a wasteful number, since it uses less digits than its factorization.

5566720669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327454174.

The product of its (nonzero) digits is 4082400, while the sum is 52.

The square root of 5566720669 is about 74610.4595147356. The cubic root of 5566720669 is about 1772.2832917138.

The spelling of 5566720669 in words is "five billion, five hundred sixty-six million, seven hundred twenty thousand, six hundred sixty-nine".