66316361 has 2 divisors, whose sum is σ = 66316362. Its totient is φ = 66316360.

The previous prime is 66316351. The next prime is 66316379. The reversal of 66316361 is 16361366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58369600 + 7946761 = 7640^2 + 2819^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66316361 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (66316351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33158180 + 33158181.

It is an arithmetic number, because the mean of its divisors is an integer number (33158181).

Almost surely, 2^66316361 is an apocalyptic number.

It is an amenable number.

66316361 is a deficient number, since it is larger than the sum of its proper divisors (1).

66316361 is an equidigital number, since it uses as much as digits as its factorization.

66316361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 32.

The square root of 66316361 is about 8143.4858015471. The cubic root of 66316361 is about 404.7686754996.

The spelling of 66316361 in words is "sixty-six million, three hundred sixteen thousand, three hundred sixty-one".