66169223 has 2 divisors, whose sum is σ = 66169224. Its totient is φ = 66169222.

The previous prime is 66169199. The next prime is 66169237. The reversal of 66169223 is 32296166.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66169223 - 2¹⁴ = 66152839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66169123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33084611 + 33084612.

It is an arithmetic number, because the mean of its divisors is an integer number (33084612).

Almost surely, 2^66169223 is an apocalyptic number.

66169223 is a deficient number, since it is larger than the sum of its proper divisors (1).

66169223 is an equidigital number, since it uses as much as digits as its factorization.

66169223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 35.

The square root of 66169223 is about 8134.4466929226. The cubic root of 66169223 is about 404.4690965638.

The spelling of 66169223 in words is "sixty-six million, one hundred sixty-nine thousand, two hundred twenty-three".