66257255275301 has 2 divisors, whose sum is σ = 66257255275302. Its totient is φ = 66257255275300.

The previous prime is 66257255275243. The next prime is 66257255275381. The reversal of 66257255275301 is 10357255275266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64211213976100 + 2046041299201 = 8013190^2 + 1430399^2 .

It is a cyclic number.

It is not a de Polignac number, because 66257255275301 - 2¹⁴ = 66257255258917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66257255275381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33128627637650 + 33128627637651.

It is an arithmetic number, because the mean of its divisors is an integer number (33128627637651).

Almost surely, 2^{66257255275301} is an apocalyptic number.

It is an amenable number.

66257255275301 is a deficient number, since it is larger than the sum of its proper divisors (1).

66257255275301 is an equidigital number, since it uses as much as digits as its factorization.

66257255275301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26460000, while the sum is 56.

The spelling of 66257255275301 in words is "sixty-six trillion, two hundred fifty-seven billion, two hundred fifty-five million, two hundred seventy-five thousand, three hundred one".