5505610661 has 2 divisors, whose sum is σ = 5505610662. Its totient is φ = 5505610660.

The previous prime is 5505610609. The next prime is 5505610673. The reversal of 5505610661 is 1660165055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4041017761 + 1464592900 = 63569^2 + 38270^2 .

It is a cyclic number.

It is not a de Polignac number, because 5505610661 - 2¹⁴ = 5505594277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5505610861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2752805330 + 2752805331.

It is an arithmetic number, because the mean of its divisors is an integer number (2752805331).

Almost surely, 2^5505610661 is an apocalyptic number.

It is an amenable number.

5505610661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5505610661 is an equidigital number, since it uses as much as digits as its factorization.

5505610661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 5505610661 is about 74199.8022975803. The cubic root of 5505610661 is about 1765.7741936074.

The spelling of 5505610661 in words is "five billion, five hundred five million, six hundred ten thousand, six hundred sixty-one".