66334573 has 2 divisors, whose sum is σ = 66334574. Its totient is φ = 66334572.

The previous prime is 66334559. The next prime is 66334577. The reversal of 66334573 is 37543366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50438404 + 15896169 = 7102^2 + 3987^2 .

It is a cyclic number.

It is not a de Polignac number, because 66334573 - 2²¹ = 64237421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66334577) 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, 33167286 + 33167287.

It is an arithmetic number, because the mean of its divisors is an integer number (33167287).

Almost surely, 2^66334573 is an apocalyptic number.

It is an amenable number.

66334573 is a deficient number, since it is larger than the sum of its proper divisors (1).

66334573 is an equidigital number, since it uses as much as digits as its factorization.

66334573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 37.

The square root of 66334573 is about 8144.6039191602. The cubic root of 66334573 is about 404.8057250417.

The spelling of 66334573 in words is "sixty-six million, three hundred thirty-four thousand, five hundred seventy-three".