668246259077 has 2 divisors, whose sum is σ = 668246259078. Its totient is φ = 668246259076.

The previous prime is 668246259073. The next prime is 668246259101. The reversal of 668246259077 is 770952642866.

668246259077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 667871410756 + 374848321 = 817234^2 + 19361^2 .

It is a cyclic number.

It is not a de Polignac number, because 668246259077 - 2² = 668246259073 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668246259073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334123129538 + 334123129539.

It is an arithmetic number, because the mean of its divisors is an integer number (334123129539).

Almost surely, 2^668246259077 is an apocalyptic number.

It is an amenable number.

668246259077 is a deficient number, since it is larger than the sum of its proper divisors (1).

668246259077 is an equidigital number, since it uses as much as digits as its factorization.

668246259077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60963840, while the sum is 62.

The spelling of 668246259077 in words is "six hundred sixty-eight billion, two hundred forty-six million, two hundred fifty-nine thousand, seventy-seven".