66195733 has 2 divisors, whose sum is σ = 66195734. Its totient is φ = 66195732.

The previous prime is 66195713. The next prime is 66195749. The reversal of 66195733 is 33759166.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45927729 + 20268004 = 6777^2 + 4502^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66195733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66195713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33097866 + 33097867.

It is an arithmetic number, because the mean of its divisors is an integer number (33097867).

Almost surely, 2^66195733 is an apocalyptic number.

It is an amenable number.

66195733 is a deficient number, since it is larger than the sum of its proper divisors (1).

66195733 is an equidigital number, since it uses as much as digits as its factorization.

66195733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102060, while the sum is 40.

The square root of 66195733 is about 8136.0760198022. The cubic root of 66195733 is about 404.5231047750.

The spelling of 66195733 in words is "sixty-six million, one hundred ninety-five thousand, seven hundred thirty-three".