65700181 has 2 divisors, whose sum is σ = 65700182. Its totient is φ = 65700180.

The previous prime is 65700179. The next prime is 65700221. The reversal of 65700181 is 18100756.

It is a happy number.

65700181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64160100 + 1540081 = 8010^2 + 1241^2 .

It is a cyclic number.

It is not a de Polignac number, because 65700181 - 2¹ = 65700179 is a prime.

It is a super-2 number, since 2×65700181² = 8633027566865522, which contains 22 as substring.

Together with 65700179, it forms a pair of twin primes.

It is a zygodrome in base 4.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65700101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32850090 + 32850091.

It is an arithmetic number, because the mean of its divisors is an integer number (32850091).

Almost surely, 2^65700181 is an apocalyptic number.

It is an amenable number.

65700181 is a deficient number, since it is larger than the sum of its proper divisors (1).

65700181 is an equidigital number, since it uses as much as digits as its factorization.

65700181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 65700181 is about 8105.5648168403. The cubic root of 65700181 is about 403.5111334271.

The spelling of 65700181 in words is "sixty-five million, seven hundred thousand, one hundred eighty-one".