66755535534 has 24 divisors (see below), whose sum is σ = 149993920440. Its totient is φ = 22251845016.

The previous prime is 66755535499. The next prime is 66755535629. The reversal of 66755535534 is 43553555766.

It is a happy number.

66755535534 is a `hidden beast` number, since 6 + 6 + 7 + 5 + 553 + 55 + 34 = 666.

It is a super-3 number, since 3×66755535534³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68678049 + ... + 68679020.

It is an arithmetic number, because the mean of its divisors is an integer number (6249746685).

Almost surely, 2^66755535534 is an apocalyptic number.

66755535534 is an abundant number, since it is smaller than the sum of its proper divisors (83238384906).

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

66755535534 is a wasteful number, since it uses less digits than its factorization.

66755535534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137357086 (or 137357074 counting only the distinct ones).

The product of its digits is 28350000, while the sum is 54.

The spelling of 66755535534 in words is "sixty-six billion, seven hundred fifty-five million, five hundred thirty-five thousand, five hundred thirty-four".