605660681 has 2 divisors, whose sum is σ = 605660682. Its totient is φ = 605660680.

The previous prime is 605660647. The next prime is 605660687. The reversal of 605660681 is 186066506.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 458645056 + 147015625 = 21416^2 + 12125^2 .

It is a cyclic number.

It is not a de Polignac number, because 605660681 - 2¹⁰ = 605659657 is a prime.

It is a super-2 number, since 2×605660681² = 733649721018767522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (605660687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 302830340 + 302830341.

It is an arithmetic number, because the mean of its divisors is an integer number (302830341).

Almost surely, 2^605660681 is an apocalyptic number.

It is an amenable number.

605660681 is a deficient number, since it is larger than the sum of its proper divisors (1).

605660681 is an equidigital number, since it uses as much as digits as its factorization.

605660681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 605660681 is about 24610.1743390818. The cubic root of 605660681 is about 846.0768135334.

The spelling of 605660681 in words is "six hundred five million, six hundred sixty thousand, six hundred eighty-one".