66069193 has 2 divisors, whose sum is σ = 66069194. Its totient is φ = 66069192.

The previous prime is 66069181. The next prime is 66069229. The reversal of 66069193 is 39196066.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65723449 + 345744 = 8107^2 + 588^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66069193 is a prime.

It is not a weakly prime, because it can be changed into another prime (66069103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33034596 + 33034597.

It is an arithmetic number, because the mean of its divisors is an integer number (33034597).

Almost surely, 2^66069193 is an apocalyptic number.

It is an amenable number.

66069193 is a deficient number, since it is larger than the sum of its proper divisors (1).

66069193 is an equidigital number, since it uses as much as digits as its factorization.

66069193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 66069193 is about 8128.2958238489. The cubic root of 66069193 is about 404.2651777490.

The spelling of 66069193 in words is "sixty-six million, sixty-nine thousand, one hundred ninety-three".