66741361 has 2 divisors, whose sum is σ = 66741362. Its totient is φ = 66741360.

The previous prime is 66741359. The next prime is 66741391. The reversal of 66741361 is 16314766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34751025 + 31990336 = 5895^2 + 5656^2 .

It is a cyclic number.

It is not a de Polignac number, because 66741361 - 2¹ = 66741359 is a prime.

Together with 66741359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (66741391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33370680 + 33370681.

It is an arithmetic number, because the mean of its divisors is an integer number (33370681).

Almost surely, 2^66741361 is an apocalyptic number.

It is an amenable number.

66741361 is a deficient number, since it is larger than the sum of its proper divisors (1).

66741361 is an equidigital number, since it uses as much as digits as its factorization.

66741361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 34.

The square root of 66741361 is about 8169.5386038625. The cubic root of 66741361 is about 405.6315118577.

The spelling of 66741361 in words is "sixty-six million, seven hundred forty-one thousand, three hundred sixty-one".