66042212575 has 24 divisors (see below), whose sum is σ = 89174984400. Its totient is φ = 48327068160.

The previous prime is 66042212563. The next prime is 66042212591. The reversal of 66042212575 is 57521224066.

It is not a de Polignac number, because 66042212575 - 2¹⁹ = 66041688287 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 2383402 + ... + 2410951.

It is an arithmetic number, because the mean of its divisors is an integer number (3715624350).

Almost surely, 2^66042212575 is an apocalyptic number.

66042212575 is a deficient number, since it is larger than the sum of its proper divisors (23132771825).

66042212575 is a wasteful number, since it uses less digits than its factorization.

66042212575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4794411 (or 4794406 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 66042212575 in words is "sixty-six billion, forty-two million, two hundred twelve thousand, five hundred seventy-five".