55663717 has 4 divisors (see below), whose sum is σ = 55907020. Its totient is φ = 55420416.

The previous prime is 55663681. The next prime is 55663733. The reversal of 55663717 is 71736655.

It is a happy number.

55663717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39551521 + 16112196 = 6289^2 + 4014^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55663717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55663717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55663747) 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 in 3 ways as a sum of consecutive naturals, for example, 121308 + ... + 121765.

It is an arithmetic number, because the mean of its divisors is an integer number (13976755).

Almost surely, 2^55663717 is an apocalyptic number.

It is an amenable number.

55663717 is a deficient number, since it is larger than the sum of its proper divisors (243303).

55663717 is a wasteful number, since it uses less digits than its factorization.

55663717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243302.

The product of its digits is 132300, while the sum is 40.

The square root of 55663717 is about 7460.8120871658. The cubic root of 55663717 is about 381.8188815472.

The spelling of 55663717 in words is "fifty-five million, six hundred sixty-three thousand, seven hundred seventeen".