676127561 has 2 divisors, whose sum is σ = 676127562. Its totient is φ = 676127560.

The previous prime is 676127537. The next prime is 676127563. The reversal of 676127561 is 165721676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 648669961 + 27457600 = 25469^2 + 5240^2 .

It is a cyclic number.

It is not a de Polignac number, because 676127561 - 2⁶ = 676127497 is a prime.

Together with 676127563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (676127563) 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, 338063780 + 338063781.

It is an arithmetic number, because the mean of its divisors is an integer number (338063781).

Almost surely, 2^676127561 is an apocalyptic number.

It is an amenable number.

676127561 is a deficient number, since it is larger than the sum of its proper divisors (1).

676127561 is an equidigital number, since it uses as much as digits as its factorization.

676127561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 676127561 is about 26002.4529804401. The cubic root of 676127561 is about 877.6934954232.

The spelling of 676127561 in words is "six hundred seventy-six million, one hundred twenty-seven thousand, five hundred sixty-one".