66055005571 has 8 divisors (see below), whose sum is σ = 70206532704. Its totient is φ = 61933027200.

The previous prime is 66055005563. The next prime is 66055005589. The reversal of 66055005571 is 17550055066.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66055005571 - 2³ = 66055005563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66055005521) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7382580 + ... + 7391521.

It is an arithmetic number, because the mean of its divisors is an integer number (8775816588).

Almost surely, 2^66055005571 is an apocalyptic number.

66055005571 is a deficient number, since it is larger than the sum of its proper divisors (4151527133).

66055005571 is a wasteful number, since it uses less digits than its factorization.

66055005571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14774381.

The product of its (nonzero) digits is 157500, while the sum is 40.

The spelling of 66055005571 in words is "sixty-six billion, fifty-five million, five thousand, five hundred seventy-one".