66555060550 has 24 divisors (see below), whose sum is σ = 135046269432. Its totient is φ = 24201840000.

The previous prime is 66555060529. The next prime is 66555060569. The reversal of 66555060550 is 5506055566.

It is a junction number, because it is equal to n+sod(n) for n = 66555060497 and 66555060506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60504051 + ... + 60505150.

It is an arithmetic number, because the mean of its divisors is an integer number (5626927893).

Almost surely, 2^66555060550 is an apocalyptic number.

66555060550 is an abundant number, since it is smaller than the sum of its proper divisors (68491208882).

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

66555060550 is a wasteful number, since it uses less digits than its factorization.

66555060550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121009224 (or 121009219 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 43.

The spelling of 66555060550 in words is "sixty-six billion, five hundred fifty-five million, sixty thousand, five hundred fifty".