666673141718377 has 2 divisors, whose sum is σ = 666673141718378. Its totient is φ = 666673141718376.

The previous prime is 666673141718299. The next prime is 666673141718387. The reversal of 666673141718377 is 773817141376666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 641221358877801 + 25451782840576 = 25322349^2 + 5044976^2 .

It is a cyclic number.

It is not a de Polignac number, because 666673141718377 - 2³⁵ = 666638781980009 is a prime.

It is not a weakly prime, because it can be changed into another prime (666673141718387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333336570859188 + 333336570859189.

It is an arithmetic number, because the mean of its divisors is an integer number (333336570859189).

Almost surely, 2^{666673141718377} is an apocalyptic number.

It is an amenable number.

666673141718377 is a deficient number, since it is larger than the sum of its proper divisors (1).

666673141718377 is an equidigital number, since it uses as much as digits as its factorization.

666673141718377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 896168448, while the sum is 73.

The spelling of 666673141718377 in words is "six hundred sixty-six trillion, six hundred seventy-three billion, one hundred forty-one million, seven hundred eighteen thousand, three hundred seventy-seven".