670982561 has 2 divisors, whose sum is σ = 670982562. Its totient is φ = 670982560.

The previous prime is 670982497. The next prime is 670982563. The reversal of 670982561 is 165289076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 644398225 + 26584336 = 25385^2 + 5156^2 .

It is a cyclic number.

It is not a de Polignac number, because 670982561 - 2⁶ = 670982497 is a prime.

It is a super-2 number, since 2×670982561² = 900435194332237442, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 670982563, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (670982563) 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, 335491280 + 335491281.

It is an arithmetic number, because the mean of its divisors is an integer number (335491281).

Almost surely, 2^670982561 is an apocalyptic number.

It is an amenable number.

670982561 is a deficient number, since it is larger than the sum of its proper divisors (1).

670982561 is an equidigital number, since it uses as much as digits as its factorization.

670982561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 670982561 is about 25903.3310792261. The cubic root of 670982561 is about 875.4615517596.

The spelling of 670982561 in words is "six hundred seventy million, nine hundred eighty-two thousand, five hundred sixty-one".