66304061 has 2 divisors, whose sum is σ = 66304062. Its totient is φ = 66304060.

The previous prime is 66304057. The next prime is 66304079. The reversal of 66304061 is 16040366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54096025 + 12208036 = 7355^2 + 3494^2 .

It is a cyclic number.

It is not a de Polignac number, because 66304061 - 2² = 66304057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66304061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66304081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33152030 + 33152031.

It is an arithmetic number, because the mean of its divisors is an integer number (33152031).

Almost surely, 2^66304061 is an apocalyptic number.

It is an amenable number.

66304061 is a deficient number, since it is larger than the sum of its proper divisors (1).

66304061 is an equidigital number, since it uses as much as digits as its factorization.

66304061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 66304061 is about 8142.7305616728. The cubic root of 66304061 is about 404.7436491840.

The spelling of 66304061 in words is "sixty-six million, three hundred four thousand, sixty-one".