66730633 has 2 divisors, whose sum is σ = 66730634. Its totient is φ = 66730632.

The previous prime is 66730621. The next prime is 66730637. The reversal of 66730633 is 33603766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42994249 + 23736384 = 6557^2 + 4872^2 .

It is a cyclic number.

It is not a de Polignac number, because 66730633 - 2¹³ = 66722441 is a prime.

It is not a weakly prime, because it can be changed into another prime (66730637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33365316 + 33365317.

It is an arithmetic number, because the mean of its divisors is an integer number (33365317).

Almost surely, 2^66730633 is an apocalyptic number.

It is an amenable number.

66730633 is a deficient number, since it is larger than the sum of its proper divisors (1).

66730633 is an equidigital number, since it uses as much as digits as its factorization.

66730633 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 34.

The square root of 66730633 is about 8168.8819920476. The cubic root of 66730633 is about 405.6097769696.

The spelling of 66730633 in words is "sixty-six million, seven hundred thirty thousand, six hundred thirty-three".