65340181 has 2 divisors, whose sum is σ = 65340182. Its totient is φ = 65340180.

The previous prime is 65340179. The next prime is 65340227. The reversal of 65340181 is 18104356.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61858225 + 3481956 = 7865^2 + 1866^2 .

It is a cyclic number.

It is not a de Polignac number, because 65340181 - 2¹ = 65340179 is a prime.

It is a super-2 number, since 2×65340181² = 8538678506225522, which contains 22 as substring.

Together with 65340179, 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 (65340131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32670090 + 32670091.

It is an arithmetic number, because the mean of its divisors is an integer number (32670091).

Almost surely, 2^65340181 is an apocalyptic number.

It is an amenable number.

65340181 is a deficient number, since it is larger than the sum of its proper divisors (1).

65340181 is an equidigital number, since it uses as much as digits as its factorization.

65340181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 65340181 is about 8083.3273470768. The cubic root of 65340181 is about 402.7727785849.

The spelling of 65340181 in words is "sixty-five million, three hundred forty thousand, one hundred eighty-one".