66253193 has 2 divisors, whose sum is σ = 66253194. Its totient is φ = 66253192.

The previous prime is 66253181. The next prime is 66253211. The reversal of 66253193 is 39135266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55547209 + 10705984 = 7453^2 + 3272^2 .

It is a cyclic number.

It is not a de Polignac number, because 66253193 - 2⁴ = 66253177 is a prime.

It is not a weakly prime, because it can be changed into another prime (66253123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33126596 + 33126597.

It is an arithmetic number, because the mean of its divisors is an integer number (33126597).

Almost surely, 2^66253193 is an apocalyptic number.

It is an amenable number.

66253193 is a deficient number, since it is larger than the sum of its proper divisors (1).

66253193 is an equidigital number, since it uses as much as digits as its factorization.

66253193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 35.

The square root of 66253193 is about 8139.6064401174. The cubic root of 66253193 is about 404.6401172284.

The spelling of 66253193 in words is "sixty-six million, two hundred fifty-three thousand, one hundred ninety-three".