668048077663 has 2 divisors, whose sum is σ = 668048077664. Its totient is φ = 668048077662.

The previous prime is 668048077657. The next prime is 668048077693. The reversal of 668048077663 is 366770840866.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-668048077663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668048077643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334024038831 + 334024038832.

It is an arithmetic number, because the mean of its divisors is an integer number (334024038832).

Almost surely, 2^668048077663 is an apocalyptic number.

668048077663 is a deficient number, since it is larger than the sum of its proper divisors (1).

668048077663 is an equidigital number, since it uses as much as digits as its factorization.

668048077663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48771072, while the sum is 61.

The spelling of 668048077663 in words is "six hundred sixty-eight billion, forty-eight million, seventy-seven thousand, six hundred sixty-three".