66736361 has 2 divisors, whose sum is σ = 66736362. Its totient is φ = 66736360.

The previous prime is 66736333. The next prime is 66736393. The reversal of 66736361 is 16363766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55413136 + 11323225 = 7444^2 + 3365^2 .

It is a cyclic number.

It is not a de Polignac number, because 66736361 - 2⁶ = 66736297 is a prime.

It is not a weakly prime, because it can be changed into another prime (66736321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33368180 + 33368181.

It is an arithmetic number, because the mean of its divisors is an integer number (33368181).

Almost surely, 2^66736361 is an apocalyptic number.

It is an amenable number.

66736361 is a deficient number, since it is larger than the sum of its proper divisors (1).

66736361 is an equidigital number, since it uses as much as digits as its factorization.

66736361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 38.

The square root of 66736361 is about 8169.2325832969. The cubic root of 66736361 is about 405.6213821661.

The spelling of 66736361 in words is "sixty-six million, seven hundred thirty-six thousand, three hundred sixty-one".