676557961 has 2 divisors, whose sum is σ = 676557962. Its totient is φ = 676557960.

The previous prime is 676557911. The next prime is 676557967. The reversal of 676557961 is 169755676.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 508051600 + 168506361 = 22540^2 + 12981^2 .

It is a cyclic number.

It is not a de Polignac number, because 676557961 - 2²⁷ = 542340233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 676557899 and 676557908.

It is not a weakly prime, because it can be changed into another prime (676557967) 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, 338278980 + 338278981.

It is an arithmetic number, because the mean of its divisors is an integer number (338278981).

Almost surely, 2^676557961 is an apocalyptic number.

It is an amenable number.

676557961 is a deficient number, since it is larger than the sum of its proper divisors (1).

676557961 is an equidigital number, since it uses as much as digits as its factorization.

676557961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2381400, while the sum is 52.

The square root of 676557961 is about 26010.7278060419. The cubic root of 676557961 is about 877.8796926116.

The spelling of 676557961 in words is "six hundred seventy-six million, five hundred fifty-seven thousand, nine hundred sixty-one".