663172271366 has 32 divisors (see below), whose sum is σ = 1110518373888. Its totient is φ = 294407699040.

The previous prime is 663172271357. The next prime is 663172271371.

663172271366 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16916660 + ... + 16955816.

It is an arithmetic number, because the mean of its divisors is an integer number (34703699184).

Almost surely, 2^663172271366 is an apocalyptic number.

663172271366 is a deficient number, since it is larger than the sum of its proper divisors (447346102522).

663172271366 is a wasteful number, since it uses less digits than its factorization.

663172271366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57116.

The product of its digits is 2286144, while the sum is 50.

The spelling of 663172271366 in words is "six hundred sixty-three billion, one hundred seventy-two million, two hundred seventy-one thousand, three hundred sixty-six".