66741933939 has 4 divisors (see below), whose sum is σ = 88989245256. Its totient is φ = 44494622624.

The previous prime is 66741933931. The next prime is 66741933949. The reversal of 66741933939 is 93933914766.

66741933939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66741933939 - 2³ = 66741933931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66741933931) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11123655654 + ... + 11123655659.

It is an arithmetic number, because the mean of its divisors is an integer number (22247311314).

Almost surely, 2^66741933939 is an apocalyptic number.

66741933939 is a deficient number, since it is larger than the sum of its proper divisors (22247311317).

66741933939 is a wasteful number, since it uses less digits than its factorization.

66741933939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22247311316.

The product of its digits is 19840464, while the sum is 60.

The spelling of 66741933939 in words is "sixty-six billion, seven hundred forty-one million, nine hundred thirty-three thousand, nine hundred thirty-nine".