65550550220 has 12 divisors (see below), whose sum is σ = 137656155504. Its totient is φ = 26220220080.

The previous prime is 65550550201. The next prime is 65550550237. The reversal of 65550550220 is 2205505556.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1638763736 + ... + 1638763775.

It is an arithmetic number, because the mean of its divisors is an integer number (11471346292).

Almost surely, 2^65550550220 is an apocalyptic number.

It is an amenable number.

65550550220 is an abundant number, since it is smaller than the sum of its proper divisors (72105605284).

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

65550550220 is a wasteful number, since it uses less digits than its factorization.

65550550220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3277527520 (or 3277527518 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 35.

The spelling of 65550550220 in words is "sixty-five billion, five hundred fifty million, five hundred fifty thousand, two hundred twenty".