66740345075 has 12 divisors (see below), whose sum is σ = 82821875400. Its totient is φ = 53351084160.

The previous prime is 66740345057. The next prime is 66740345081. The reversal of 66740345075 is 57054304766.

66740345075 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66740345075 - 2¹⁴ = 66740328691 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 996725 + ... + 1061574.

It is an arithmetic number, because the mean of its divisors is an integer number (6901822950).

Almost surely, 2^66740345075 is an apocalyptic number.

66740345075 is a deficient number, since it is larger than the sum of its proper divisors (16081530325).

66740345075 is a wasteful number, since it uses less digits than its factorization.

66740345075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059606 (or 2059601 counting only the distinct ones).

The product of its (nonzero) digits is 2116800, while the sum is 47.

The spelling of 66740345075 in words is "sixty-six billion, seven hundred forty million, three hundred forty-five thousand, seventy-five".