166491272303728 has 40 divisors (see below), whose sum is σ = 329566451664960. Its totient is φ = 81443223214080.

The previous prime is 166491272303663. The next prime is 166491272303731. The reversal of 166491272303728 is 827303272194661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40467693 + ... + 44391628.

It is an arithmetic number, because the mean of its divisors is an integer number (8239161291624).

Almost surely, 2^{166491272303728} is an apocalyptic number.

It is an amenable number.

166491272303728 is a deficient number, since it is larger than the sum of its proper divisors (163075179361232).

166491272303728 is a wasteful number, since it uses less digits than its factorization.

166491272303728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84861985 (or 84861979 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 61.

The spelling of 166491272303728 in words is "one hundred sixty-six trillion, four hundred ninety-one billion, two hundred seventy-two million, three hundred three thousand, seven hundred twenty-eight".