66855042002 has 16 divisors (see below), whose sum is σ = 114651329280. Its totient is φ = 28641489408.

The previous prime is 66855041977. The next prime is 66855042047. The reversal of 66855042002 is 20024055866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 850298 + ... + 925589.

It is an arithmetic number, because the mean of its divisors is an integer number (7165708080).

Almost surely, 2^66855042002 is an apocalyptic number.

66855042002 is a deficient number, since it is larger than the sum of its proper divisors (47796287278).

66855042002 is a wasteful number, since it uses less digits than its factorization.

66855042002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778585.

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 66855042002 its reverse (20024055866), we get a palindrome (86879097868).

The spelling of 66855042002 in words is "sixty-six billion, eight hundred fifty-five million, forty-two thousand, two".