55663960 has 64 divisors (see below), whose sum is σ = 138581280. Its totient is φ = 19952640.

The previous prime is 55663921. The next prime is 55663987. The reversal of 55663960 is 6936655.

55663960 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 31254 + ... + 32986.

Almost surely, 2^55663960 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55663960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69290640).

55663960 is an abundant number, since it is smaller than the sum of its proper divisors (82917320).

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

55663960 is a wasteful number, since it uses less digits than its factorization.

55663960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828 (or 1824 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 40.

The square root of 55663960 is about 7460.8283722386. The cubic root of 55663960 is about 381.8194371566.

It can be divided in two parts, 556 and 63960, that added together give a square (64516 = 254²).

The spelling of 55663960 in words is "fifty-five million, six hundred sixty-three thousand, nine hundred sixty".