66585454686 has 48 divisors (see below), whose sum is σ = 145914762240. Its totient is φ = 21943308240.

The previous prime is 66585454681. The next prime is 66585454693. The reversal of 66585454686 is 68645458566.

It is a happy number.

66585454686 is a `hidden beast` number, since 6 + 6 + 5 + 8 + 5 + 4 + 546 + 86 = 666.

66585454686 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66585454681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 500985 + ... + 619803.

It is an arithmetic number, because the mean of its divisors is an integer number (3039890880).

Almost surely, 2^66585454686 is an apocalyptic number.

66585454686 is an abundant number, since it is smaller than the sum of its proper divisors (79329307554).

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

66585454686 is a wasteful number, since it uses less digits than its factorization.

66585454686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119181 (or 119178 counting only the distinct ones).

The product of its digits is 165888000, while the sum is 63.

The spelling of 66585454686 in words is "sixty-six billion, five hundred eighty-five million, four hundred fifty-four thousand, six hundred eighty-six".