5666155993 has 2 divisors, whose sum is σ = 5666155994. Its totient is φ = 5666155992.

The previous prime is 5666155991. The next prime is 5666156009. The reversal of 5666155993 is 3995516665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5240022544 + 426133449 = 72388^2 + 20643^2 .

It is a cyclic number.

It is not a de Polignac number, because 5666155993 - 2¹ = 5666155991 is a prime.

Together with 5666155991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5666155991) 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 as a sum of consecutive naturals, namely, 2833077996 + 2833077997.

It is an arithmetic number, because the mean of its divisors is an integer number (2833077997).

Almost surely, 2^5666155993 is an apocalyptic number.

It is an amenable number.

5666155993 is a deficient number, since it is larger than the sum of its proper divisors (1).

5666155993 is an equidigital number, since it uses as much as digits as its factorization.

5666155993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6561000, while the sum is 55.

The square root of 5666155993 is about 75273.8732429785. The cubic root of 5666155993 is about 1782.7735233429.

The spelling of 5666155993 in words is "five billion, six hundred sixty-six million, one hundred fifty-five thousand, nine hundred ninety-three".