55421816966 has 16 divisors (see below), whose sum is σ = 84501679680. Its totient is φ = 27255847080.

The previous prime is 55421816963. The next prime is 55421817103. The reversal of 55421816966 is 66961812455.

55421816966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55421816963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225500 + ... + 402111.

It is an arithmetic number, because the mean of its divisors is an integer number (5281354980).

Almost surely, 2^55421816966 is an apocalyptic number.

55421816966 is a deficient number, since it is larger than the sum of its proper divisors (29079862714).

55421816966 is a wasteful number, since it uses less digits than its factorization.

55421816966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628339.

The product of its digits is 3110400, while the sum is 53.

The spelling of 55421816966 in words is "fifty-five billion, four hundred twenty-one million, eight hundred sixteen thousand, nine hundred sixty-six".