668776158373 has 2 divisors, whose sum is σ = 668776158374. Its totient is φ = 668776158372.

The previous prime is 668776158367. The next prime is 668776158403. The reversal of 668776158373 is 373851677866.

668776158373 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., 479974611204 + 188801547169 = 692802^2 + 434513^2 .

It is a cyclic number.

It is not a de Polignac number, because 668776158373 - 2⁵ = 668776158341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 668776158299 and 668776158308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668776158313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334388079186 + 334388079187.

It is an arithmetic number, because the mean of its divisors is an integer number (334388079187).

Almost surely, 2^668776158373 is an apocalyptic number.

It is an amenable number.

668776158373 is a deficient number, since it is larger than the sum of its proper divisors (1).

668776158373 is an equidigital number, since it uses as much as digits as its factorization.

668776158373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 213373440, while the sum is 67.

The spelling of 668776158373 in words is "six hundred sixty-eight billion, seven hundred seventy-six million, one hundred fifty-eight thousand, three hundred seventy-three".