166635321144 has 32 divisors (see below), whose sum is σ = 416743157520. Its totient is φ = 55524459776.

The previous prime is 166635321137. The next prime is 166635321157. The reversal of 166635321144 is 441123536661.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 166635321096 and 166635321105.

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, 1224477 + ... + 1353740.

Almost surely, 2^166635321144 is an apocalyptic number.

It is an amenable number.

166635321144 is an abundant number, since it is smaller than the sum of its proper divisors (250107836376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

166635321144 is a wasteful number, since it uses less digits than its factorization.

166635321144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580919 (or 2580915 counting only the distinct ones).

The product of its digits is 311040, while the sum is 42.

The spelling of 166635321144 in words is "one hundred sixty-six billion, six hundred thirty-five million, three hundred twenty-one thousand, one hundred forty-four".