66123745471 has 8 divisors (see below), whose sum is σ = 75695740064. Its totient is φ = 56583187200.

The previous prime is 66123745459. The next prime is 66123745483. The reversal of 66123745471 is 17454732166.

It is an interprime number because it is at equal distance from previous prime (66123745459) and next prime (66123745483).

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 66123745471 - 2¹³ = 66123737279 is a prime.

It is a super-3 number, since 3×66123745471³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66123740471) 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, 7854570 + ... + 7862983.

It is an arithmetic number, because the mean of its divisors is an integer number (9461967508).

Almost surely, 2^66123745471 is an apocalyptic number.

66123745471 is a deficient number, since it is larger than the sum of its proper divisors (9571994593).

66123745471 is a wasteful number, since it uses less digits than its factorization.

66123745471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15718161.

The product of its digits is 846720, while the sum is 46.

The spelling of 66123745471 in words is "sixty-six billion, one hundred twenty-three million, seven hundred forty-five thousand, four hundred seventy-one".