166375446784 has 18 divisors (see below), whose sum is σ = 332100989990. Its totient is φ = 83187723264.

The previous prime is 166375446773. The next prime is 166375446821. The reversal of 166375446784 is 487644573661.

It can be written as a sum of positive squares in only one way, i.e., 145106141184 + 21269305600 = 380928^2 + 145840^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324951789 + ... + 324952300.

Almost surely, 2^166375446784 is an apocalyptic number.

It is an amenable number.

166375446784 is a deficient number, since it is larger than the sum of its proper divisors (165725543206).

166375446784 is an frugal number, since it uses more digits than its factorization.

166375446784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649904105 (or 649904091 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 61.

The spelling of 166375446784 in words is "one hundred sixty-six billion, three hundred seventy-five million, four hundred forty-six thousand, seven hundred eighty-four".