66505555005 has 16 divisors (see below), whose sum is σ = 106439716224. Its totient is φ = 35459353280.

The previous prime is 66505554967. The next prime is 66505555093. The reversal of 66505555005 is 50055550566.

It is not a de Polignac number, because 66505555005 - 2⁷ = 66505554877 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588609 + ... + 692438.

It is an arithmetic number, because the mean of its divisors is an integer number (6652482264).

Almost surely, 2^66505555005 is an apocalyptic number.

It is an amenable number.

66505555005 is a deficient number, since it is larger than the sum of its proper divisors (39934161219).

66505555005 is a wasteful number, since it uses less digits than its factorization.

66505555005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284516.

The product of its (nonzero) digits is 562500, while the sum is 42.

It can be divided in two parts, 6650 and 5555005, that added together give a palindrome (5561655).

The spelling of 66505555005 in words is "sixty-six billion, five hundred five million, five hundred fifty-five thousand, five".