66031188448777 has 2 divisors, whose sum is σ = 66031188448778. Its totient is φ = 66031188448776.

The previous prime is 66031188448763. The next prime is 66031188448783. The reversal of 66031188448777 is 77784488113066.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63873406663056 + 2157781785721 = 7992084^2 + 1468939^2 .

It is a cyclic number.

It is not a de Polignac number, because 66031188448777 - 2⁷ = 66031188448649 is a prime.

It is a super-2 number, since 2×66031188448777² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66031188448177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33015594224388 + 33015594224389.

It is an arithmetic number, because the mean of its divisors is an integer number (33015594224389).

Almost surely, 2^{66031188448777} is an apocalyptic number.

It is an amenable number.

66031188448777 is a deficient number, since it is larger than the sum of its proper divisors (1).

66031188448777 is an equidigital number, since it uses as much as digits as its factorization.

66031188448777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 303464448, while the sum is 70.

The spelling of 66031188448777 in words is "sixty-six trillion, thirty-one billion, one hundred eighty-eight million, four hundred forty-eight thousand, seven hundred seventy-seven".