66356804206 has 48 divisors (see below), whose sum is σ = 128999423232. Its totient is φ = 25303210800.

The previous prime is 66356804179. The next prime is 66356804207. The reversal of 66356804206 is 60240865366.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66356804207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 604180 + ... + 705511.

It is an arithmetic number, because the mean of its divisors is an integer number (2687487984).

Almost surely, 2^66356804206 is an apocalyptic number.

66356804206 is a deficient number, since it is larger than the sum of its proper divisors (62642619026).

66356804206 is a wasteful number, since it uses less digits than its factorization.

66356804206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309765 (or 1309758 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 66356804206 in words is "sixty-six billion, three hundred fifty-six million, eight hundred four thousand, two hundred six".