55663686 has 40 divisors (see below), whose sum is σ = 134327424. Its totient is φ = 17126640.

The previous prime is 55663681. The next prime is 55663733. The reversal of 55663686 is 68636655.

55663686 is a `hidden beast` number, since 5 + 5 + 6 + 636 + 8 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55663681) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11110 + ... + 15321.

Almost surely, 2^55663686 is an apocalyptic number.

55663686 is an abundant number, since it is smaller than the sum of its proper divisors (78663738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55663686 is a wasteful number, since it uses less digits than its factorization.

55663686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26458 (or 26449 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The square root of 55663686 is about 7460.8100096437. The cubic root of 55663686 is about 381.8188106669.

The spelling of 55663686 in words is "fifty-five million, six hundred sixty-three thousand, six hundred eighty-six".