66208361 has 2 divisors, whose sum is σ = 66208362. Its totient is φ = 66208360.

The previous prime is 66208357. The next prime is 66208367. The reversal of 66208361 is 16380266.

66208361 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., 60543961 + 5664400 = 7781^2 + 2380^2 .

It is a cyclic number.

It is not a de Polignac number, because 66208361 - 2² = 66208357 is a prime.

It is not a weakly prime, because it can be changed into another prime (66208367) 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, 33104180 + 33104181.

It is an arithmetic number, because the mean of its divisors is an integer number (33104181).

Almost surely, 2^66208361 is an apocalyptic number.

It is an amenable number.

66208361 is a deficient number, since it is larger than the sum of its proper divisors (1).

66208361 is an equidigital number, since it uses as much as digits as its factorization.

66208361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 66208361 is about 8136.8520325738. The cubic root of 66208361 is about 404.5488264378.

The spelling of 66208361 in words is "sixty-six million, two hundred eight thousand, three hundred sixty-one".