66229253 has 2 divisors, whose sum is σ = 66229254. Its totient is φ = 66229252.

The previous prime is 66229201. The next prime is 66229271. The reversal of 66229253 is 35292266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66227044 + 2209 = 8138^2 + 47^2 .

It is a cyclic number.

It is not a de Polignac number, because 66229253 - 2¹² = 66225157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66229283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33114626 + 33114627.

It is an arithmetic number, because the mean of its divisors is an integer number (33114627).

Almost surely, 2^66229253 is an apocalyptic number.

It is an amenable number.

66229253 is a deficient number, since it is larger than the sum of its proper divisors (1).

66229253 is an equidigital number, since it uses as much as digits as its factorization.

66229253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 35.

The square root of 66229253 is about 8138.1357201757. The cubic root of 66229253 is about 404.5913736585.

The spelling of 66229253 in words is "sixty-six million, two hundred twenty-nine thousand, two hundred fifty-three".