66204260066 has 32 divisors (see below), whose sum is σ = 115947459072. Its totient is φ = 27760057920.

The previous prime is 66204260053. The next prime is 66204260071. The reversal of 66204260066 is 66006240266.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2103800 + ... + 2135036.

It is an arithmetic number, because the mean of its divisors is an integer number (3623358096).

Almost surely, 2^66204260066 is an apocalyptic number.

66204260066 is a deficient number, since it is larger than the sum of its proper divisors (49743199006).

66204260066 is a wasteful number, since it uses less digits than its factorization.

66204260066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34514.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 66204260066 in words is "sixty-six billion, two hundred four million, two hundred sixty thousand, sixty-six".