675744661 has 2 divisors, whose sum is σ = 675744662. Its totient is φ = 675744660.

The previous prime is 675744617. The next prime is 675744791. The reversal of 675744661 is 166447576.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 660181636 + 15563025 = 25694^2 + 3945^2 .

It is a cyclic number.

It is not a de Polignac number, because 675744661 - 2⁷ = 675744533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (675744361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337872330 + 337872331.

It is an arithmetic number, because the mean of its divisors is an integer number (337872331).

Almost surely, 2^675744661 is an apocalyptic number.

It is an amenable number.

675744661 is a deficient number, since it is larger than the sum of its proper divisors (1).

675744661 is an equidigital number, since it uses as much as digits as its factorization.

675744661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 46.

The square root of 675744661 is about 25995.0891708415. The cubic root of 675744661 is about 877.5277809837.

The spelling of 675744661 in words is "six hundred seventy-five million, seven hundred forty-four thousand, six hundred sixty-one".