4216665181 has 2 divisors, whose sum is σ = 4216665182. Its totient is φ = 4216665180.

The previous prime is 4216665179. The next prime is 4216665197. The reversal of 4216665181 is 1815666124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3848217156 + 368448025 = 62034^2 + 19195^2 .

It is a cyclic number.

It is not a de Polignac number, because 4216665181 - 2¹ = 4216665179 is a prime.

It is a super-2 number, since 2×4216665181² = 35560530497315525522, which contains 22 as substring.

Together with 4216665179, 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 (4216665121) 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, 2108332590 + 2108332591.

It is an arithmetic number, because the mean of its divisors is an integer number (2108332591).

Almost surely, 2^4216665181 is an apocalyptic number.

It is an amenable number.

4216665181 is a deficient number, since it is larger than the sum of its proper divisors (1).

4216665181 is an equidigital number, since it uses as much as digits as its factorization.

4216665181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 40.

The square root of 4216665181 is about 64935.8543564339. The cubic root of 4216665181 is about 1615.5598044000.

The spelling of 4216665181 in words is "four billion, two hundred sixteen million, six hundred sixty-five thousand, one hundred eighty-one".