66566290253 has 2 divisors, whose sum is σ = 66566290254. Its totient is φ = 66566290252.

The previous prime is 66566290247. The next prime is 66566290267. The reversal of 66566290253 is 35209266566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66524273929 + 42016324 = 257923^2 + 6482^2 .

It is a cyclic number.

It is not a de Polignac number, because 66566290253 - 2¹⁴ = 66566273869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66566290243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33283145126 + 33283145127.

It is an arithmetic number, because the mean of its divisors is an integer number (33283145127).

Almost surely, 2^66566290253 is an apocalyptic number.

It is an amenable number.

66566290253 is a deficient number, since it is larger than the sum of its proper divisors (1).

66566290253 is an equidigital number, since it uses as much as digits as its factorization.

66566290253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3499200, while the sum is 50.

The spelling of 66566290253 in words is "sixty-six billion, five hundred sixty-six million, two hundred ninety thousand, two hundred fifty-three".