5668782181 has 2 divisors, whose sum is σ = 5668782182. Its totient is φ = 5668782180.

The previous prime is 5668782179. The next prime is 5668782241. The reversal of 5668782181 is 1812878665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5275116900 + 393665281 = 72630^2 + 19841^2 .

It is a cyclic number.

It is not a de Polignac number, because 5668782181 - 2¹ = 5668782179 is a prime.

It is a super-2 number, since 2×5668782181² = 64270182831246233522, which contains 22 as substring.

Together with 5668782179, 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 (5668782131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2834391090 + 2834391091.

It is an arithmetic number, because the mean of its divisors is an integer number (2834391091).

Almost surely, 2^5668782181 is an apocalyptic number.

It is an amenable number.

5668782181 is a deficient number, since it is larger than the sum of its proper divisors (1).

5668782181 is an equidigital number, since it uses as much as digits as its factorization.

5668782181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1290240, while the sum is 52.

The square root of 5668782181 is about 75291.3154420880. The cubic root of 5668782181 is about 1783.0489114128.

The spelling of 5668782181 in words is "five billion, six hundred sixty-eight million, seven hundred eighty-two thousand, one hundred eighty-one".