55663633 has 2 divisors, whose sum is σ = 55663634. Its totient is φ = 55663632.

The previous prime is 55663591. The next prime is 55663639. The reversal of 55663633 is 33636655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46621584 + 9042049 = 6828^2 + 3007^2 .

It is a cyclic number.

It is not a de Polignac number, because 55663633 - 2⁹ = 55663121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55663592 and 55663601.

It is not a weakly prime, because it can be changed into another prime (55663639) 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, 27831816 + 27831817.

It is an arithmetic number, because the mean of its divisors is an integer number (27831817).

Almost surely, 2^55663633 is an apocalyptic number.

It is an amenable number.

55663633 is a deficient number, since it is larger than the sum of its proper divisors (1).

55663633 is an equidigital number, since it uses as much as digits as its factorization.

55663633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 37.

The square root of 55663633 is about 7460.8064577497. The cubic root of 55663633 is about 381.8186894843.

The spelling of 55663633 in words is "fifty-five million, six hundred sixty-three thousand, six hundred thirty-three".