5520566661 has 4 divisors (see below), whose sum is σ = 7360755552. Its totient is φ = 3680377772.

The previous prime is 5520566629. The next prime is 5520566713. The reversal of 5520566661 is 1666650255.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5520566661 - 2⁵ = 5520566629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5520556661) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 920094441 + ... + 920094446.

It is an arithmetic number, because the mean of its divisors is an integer number (1840188888).

Almost surely, 2^5520566661 is an apocalyptic number.

It is an amenable number.

5520566661 is a deficient number, since it is larger than the sum of its proper divisors (1840188891).

5520566661 is a wasteful number, since it uses less digits than its factorization.

5520566661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1840188890.

The product of its (nonzero) digits is 324000, while the sum is 42.

The square root of 5520566661 is about 74300.5158864997. The cubic root of 5520566661 is about 1767.3716574310.

The spelling of 5520566661 in words is "five billion, five hundred twenty million, five hundred sixty-six thousand, six hundred sixty-one".