66363701177 has 2 divisors, whose sum is σ = 66363701178. Its totient is φ = 66363701176.

The previous prime is 66363701167. The next prime is 66363701179. The reversal of 66363701177 is 77110736366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61264170256 + 5099530921 = 247516^2 + 71411^2 .

It is a cyclic number.

It is not a de Polignac number, because 66363701177 - 2⁶ = 66363701113 is a prime.

Together with 66363701179, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (66363701179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33181850588 + 33181850589.

It is an arithmetic number, because the mean of its divisors is an integer number (33181850589).

Almost surely, 2^66363701177 is an apocalyptic number.

It is an amenable number.

66363701177 is a deficient number, since it is larger than the sum of its proper divisors (1).

66363701177 is an equidigital number, since it uses as much as digits as its factorization.

66363701177 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 666792, while the sum is 47.

The spelling of 66363701177 in words is "sixty-six billion, three hundred sixty-three million, seven hundred one thousand, one hundred seventy-seven".