634666004677 has 2 divisors, whose sum is σ = 634666004678. Its totient is φ = 634666004676.

The previous prime is 634666004669. The next prime is 634666004717. The reversal of 634666004677 is 776400666436.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 484842045636 + 149823959041 = 696306^2 + 387071^2 .

It is a cyclic number.

It is not a de Polignac number, because 634666004677 - 2³ = 634666004669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634666008677) 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, 317333002338 + 317333002339.

It is an arithmetic number, because the mean of its divisors is an integer number (317333002339).

Almost surely, 2^634666004677 is an apocalyptic number.

It is an amenable number.

634666004677 is a deficient number, since it is larger than the sum of its proper divisors (1).

634666004677 is an equidigital number, since it uses as much as digits as its factorization.

634666004677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18289152, while the sum is 55.

The spelling of 634666004677 in words is "six hundred thirty-four billion, six hundred sixty-six million, four thousand, six hundred seventy-seven".