63661057 has 2 divisors, whose sum is σ = 63661058. Its totient is φ = 63661056.

The previous prime is 63661049. The next prime is 63661097. The reversal of 63661057 is 75016636.

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., 62663056 + 998001 = 7916^2 + 999^2 .

It is a cyclic number.

It is not a de Polignac number, because 63661057 - 2³ = 63661049 is a prime.

It is equal to p_3766129 and since 63661057 and 3766129 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (63661097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31830528 + 31830529.

It is an arithmetic number, because the mean of its divisors is an integer number (31830529).

Almost surely, 2^63661057 is an apocalyptic number.

It is an amenable number.

63661057 is a deficient number, since it is larger than the sum of its proper divisors (1).

63661057 is an equidigital number, since it uses as much as digits as its factorization.

63661057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 63661057 is about 7978.7879405333. The cubic root of 63661057 is about 399.2926185160.

The spelling of 63661057 in words is "sixty-three million, six hundred sixty-one thousand, fifty-seven".