687326066741 has 2 divisors, whose sum is σ = 687326066742. Its totient is φ = 687326066740.

The previous prime is 687326066711. The next prime is 687326066753. The reversal of 687326066741 is 147660623786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 643398098641 + 43927968100 = 802121^2 + 209590^2 .

It is a cyclic number.

It is not a de Polignac number, because 687326066741 - 2¹⁸ = 687325804597 is a prime.

It is a super-2 number, since 2×687326066741² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687326066711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343663033370 + 343663033371.

It is an arithmetic number, because the mean of its divisors is an integer number (343663033371).

Almost surely, 2^687326066741 is an apocalyptic number.

It is an amenable number.

687326066741 is a deficient number, since it is larger than the sum of its proper divisors (1).

687326066741 is an equidigital number, since it uses as much as digits as its factorization.

687326066741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12192768, while the sum is 56.

The spelling of 687326066741 in words is "six hundred eighty-seven billion, three hundred twenty-six million, sixty-six thousand, seven hundred forty-one".