66740733707371 has 16 divisors (see below), whose sum is σ = 69417718983360. Its totient is φ = 64089586592640.

The previous prime is 66740733707357. The next prime is 66740733707419. The reversal of 66740733707371 is 17370733704766.

It is a cyclic number.

It is not a de Polignac number, because 66740733707371 - 2²¹ = 66740731610219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66740733707311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2462160 + ... + 11812861.

It is an arithmetic number, because the mean of its divisors is an integer number (4338607436460).

Almost surely, 2^{66740733707371} is an apocalyptic number.

66740733707371 is a deficient number, since it is larger than the sum of its proper divisors (2676985275989).

66740733707371 is a wasteful number, since it uses less digits than its factorization.

66740733707371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14275926.

The product of its (nonzero) digits is 65345616, while the sum is 61.

The spelling of 66740733707371 in words is "sixty-six trillion, seven hundred forty billion, seven hundred thirty-three million, seven hundred seven thousand, three hundred seventy-one".