5506065991 has 2 divisors, whose sum is σ = 5506065992. Its totient is φ = 5506065990.

The previous prime is 5506065989. The next prime is 5506066009. The reversal of 5506065991 is 1995606055.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5506065991 - 2¹ = 5506065989 is a prime.

Together with 5506065989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5506065091) 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 as a sum of consecutive naturals, namely, 2753032995 + 2753032996.

It is an arithmetic number, because the mean of its divisors is an integer number (2753032996).

Almost surely, 2^5506065991 is an apocalyptic number.

5506065991 is a deficient number, since it is larger than the sum of its proper divisors (1).

5506065991 is an equidigital number, since it uses as much as digits as its factorization.

5506065991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 364500, while the sum is 46.

The square root of 5506065991 is about 74202.8705037750. The cubic root of 5506065991 is about 1765.8228704844.

The spelling of 5506065991 in words is "five billion, five hundred six million, sixty-five thousand, nine hundred ninety-one".