675708661 has 2 divisors, whose sum is σ = 675708662. Its totient is φ = 675708660.

The previous prime is 675708599. The next prime is 675708667. The reversal of 675708661 is 166807576.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 667240561 + 8468100 = 25831^2 + 2910^2 .

It is a cyclic number.

It is not a de Polignac number, because 675708661 - 2¹¹ = 675706613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (675708667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 337854330 + 337854331.

It is an arithmetic number, because the mean of its divisors is an integer number (337854331).

Almost surely, 2^675708661 is an apocalyptic number.

It is an amenable number.

675708661 is a deficient number, since it is larger than the sum of its proper divisors (1).

675708661 is an equidigital number, since it uses as much as digits as its factorization.

675708661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 675708661 is about 25994.3967231402. The cubic root of 675708661 is about 877.5121974046.

The spelling of 675708661 in words is "six hundred seventy-five million, seven hundred eight thousand, six hundred sixty-one".