66430933 has 2 divisors, whose sum is σ = 66430934. Its totient is φ = 66430932.

The previous prime is 66430921. The next prime is 66430957. The reversal of 66430933 is 33903466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45252529 + 21178404 = 6727^2 + 4602^2 .

It is a cyclic number.

It is not a de Polignac number, because 66430933 - 2⁵ = 66430901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66430963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33215466 + 33215467.

It is an arithmetic number, because the mean of its divisors is an integer number (33215467).

Almost surely, 2^66430933 is an apocalyptic number.

It is an amenable number.

66430933 is a deficient number, since it is larger than the sum of its proper divisors (1).

66430933 is an equidigital number, since it uses as much as digits as its factorization.

66430933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 34.

The square root of 66430933 is about 8150.5173455432. The cubic root of 66430933 is about 405.0016420195.

The spelling of 66430933 in words is "sixty-six million, four hundred thirty thousand, nine hundred thirty-three".