66195707804 has 6 divisors (see below), whose sum is σ = 115842488664. Its totient is φ = 33097853900.

The previous prime is 66195707801. The next prime is 66195707833. The reversal of 66195707804 is 40870759166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66195707801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8274463472 + ... + 8274463479.

It is an arithmetic number, because the mean of its divisors is an integer number (19307081444).

Almost surely, 2^66195707804 is an apocalyptic number.

It is an amenable number.

66195707804 is a deficient number, since it is larger than the sum of its proper divisors (49646780860).

66195707804 is a wasteful number, since it uses less digits than its factorization.

66195707804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16548926955 (or 16548926953 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 66195707804 in words is "sixty-six billion, one hundred ninety-five million, seven hundred seven thousand, eight hundred four".