668048858777 has 2 divisors, whose sum is σ = 668048858778. Its totient is φ = 668048858776.

The previous prime is 668048858681. The next prime is 668048858783. The reversal of 668048858777 is 777858840866.

668048858777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 668005443856 + 43414921 = 817316^2 + 6589^2 .

It is a cyclic number.

It is not a de Polignac number, because 668048858777 - 2²⁶ = 667981749913 is a prime.

It is not a weakly prime, because it can be changed into another prime (668048858977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334024429388 + 334024429389.

It is an arithmetic number, because the mean of its divisors is an integer number (334024429389).

Almost surely, 2^668048858777 is an apocalyptic number.

It is an amenable number.

668048858777 is a deficient number, since it is larger than the sum of its proper divisors (1).

668048858777 is an equidigital number, since it uses as much as digits as its factorization.

668048858777 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1011548160, while the sum is 74.

The spelling of 668048858777 in words is "six hundred sixty-eight billion, forty-eight million, eight hundred fifty-eight thousand, seven hundred seventy-seven".