66250073 has 2 divisors, whose sum is σ = 66250074. Its totient is φ = 66250072.

The previous prime is 66250027. The next prime is 66250081. The reversal of 66250073 is 37005266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65496649 + 753424 = 8093^2 + 868^2 .

It is a cyclic number.

It is not a de Polignac number, because 66250073 - 2⁸ = 66249817 is a prime.

It is not a weakly prime, because it can be changed into another prime (66250673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33125036 + 33125037.

It is an arithmetic number, because the mean of its divisors is an integer number (33125037).

Almost surely, 2^66250073 is an apocalyptic number.

It is an amenable number.

66250073 is a deficient number, since it is larger than the sum of its proper divisors (1).

66250073 is an equidigital number, since it uses as much as digits as its factorization.

66250073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 66250073 is about 8139.4147824030. The cubic root of 66250073 is about 404.6337653484.

The spelling of 66250073 in words is "sixty-six million, two hundred fifty thousand, seventy-three".