66438882170 has 16 divisors (see below), whose sum is σ = 119602517760. Its totient is φ = 26572768464.

The previous prime is 66438882151. The next prime is 66438882193. The reversal of 66438882170 is 7128883466.

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 7 ways as a sum of consecutive naturals, for example, 246422 + ... + 440001.

It is an arithmetic number, because the mean of its divisors is an integer number (7475157360).

Almost surely, 2^66438882170 is an apocalyptic number.

66438882170 is a deficient number, since it is larger than the sum of its proper divisors (53163635590).

66438882170 is a wasteful number, since it uses less digits than its factorization.

66438882170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696109.

The product of its (nonzero) digits is 3096576, while the sum is 53.

The spelling of 66438882170 in words is "sixty-six billion, four hundred thirty-eight million, eight hundred eighty-two thousand, one hundred seventy".