166603722037072 has 20 divisors (see below), whose sum is σ = 322795099250100. Its totient is φ = 83301760940288.

The previous prime is 166603722037033. The next prime is 166603722037097. The reversal of 166603722037072 is 270730227306661.

It can be written as a sum of positive squares in 2 ways, for example, as 95993044140816 + 70610677896256 = 9797604^2 + 8403016^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8539554 + ... + 20152702.

It is an arithmetic number, because the mean of its divisors is an integer number (16139754962505).

Almost surely, 2^{166603722037072} is an apocalyptic number.

It is an amenable number.

166603722037072 is a deficient number, since it is larger than the sum of its proper divisors (156191377213028).

166603722037072 is a wasteful number, since it uses less digits than its factorization.

166603722037072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12509790 (or 12509784 counting only the distinct ones).

The product of its (nonzero) digits is 5334336, while the sum is 52.

The spelling of 166603722037072 in words is "one hundred sixty-six trillion, six hundred three billion, seven hundred twenty-two million, thirty-seven thousand, seventy-two".