66140237071 has 8 divisors (see below), whose sum is σ = 69675592320. Its totient is φ = 62610310872.

The previous prime is 66140237027. The next prime is 66140237081. The reversal of 66140237071 is 17073204166.

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 66140237071 - 2⁹ = 66140236559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66140237071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66140237081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1332235 + ... + 1380988.

It is an arithmetic number, because the mean of its divisors is an integer number (8709449040).

Almost surely, 2^66140237071 is an apocalyptic number.

66140237071 is a deficient number, since it is larger than the sum of its proper divisors (3535355249).

66140237071 is a wasteful number, since it uses less digits than its factorization.

66140237071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2714525.

The product of its (nonzero) digits is 42336, while the sum is 37.

The spelling of 66140237071 in words is "sixty-six billion, one hundred forty million, two hundred thirty-seven thousand, seventy-one".