66304057 has 2 divisors, whose sum is σ = 66304058. Its totient is φ = 66304056.

The previous prime is 66304039. The next prime is 66304061. The reversal of 66304057 is 75040366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66194496 + 109561 = 8136^2 + 331^2 .

It is a cyclic number.

It is not a de Polignac number, because 66304057 - 2¹¹ = 66302009 is a prime.

It is not a weakly prime, because it can be changed into another prime (66304457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33152028 + 33152029.

It is an arithmetic number, because the mean of its divisors is an integer number (33152029).

Almost surely, 2^66304057 is an apocalyptic number.

It is an amenable number.

66304057 is a deficient number, since it is larger than the sum of its proper divisors (1).

66304057 is an equidigital number, since it uses as much as digits as its factorization.

66304057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 66304057 is about 8142.7303160549. The cubic root of 66304057 is about 404.7436410449.

The spelling of 66304057 in words is "sixty-six million, three hundred four thousand, fifty-seven".