66536573 has 2 divisors, whose sum is σ = 66536574. Its totient is φ = 66536572.

The previous prime is 66536567. The next prime is 66536579. The reversal of 66536573 is 37563566.

It is a balanced prime because it is at equal distance from previous prime (66536567) and next prime (66536579).

It can be written as a sum of positive squares in only one way, i.e., 37613689 + 28922884 = 6133^2 + 5378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66536573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66536573.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66536579) 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, 33268286 + 33268287.

It is an arithmetic number, because the mean of its divisors is an integer number (33268287).

Almost surely, 2^66536573 is an apocalyptic number.

It is an amenable number.

66536573 is a deficient number, since it is larger than the sum of its proper divisors (1).

66536573 is an equidigital number, since it uses as much as digits as its factorization.

66536573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 41.

The square root of 66536573 is about 8156.9953414232. The cubic root of 66536573 is about 405.2162093033.

The spelling of 66536573 in words is "sixty-six million, five hundred thirty-six thousand, five hundred seventy-three".