166648943 has 8 divisors (see below), whose sum is σ = 185739120. Its totient is φ = 148590720.

The previous prime is 166648939. The next prime is 166648949. The reversal of 166648943 is 349846661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 166648943 - 2² = 166648939 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166648949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257648 + ... + 258293.

It is an arithmetic number, because the mean of its divisors is an integer number (23217390).

Almost surely, 2^166648943 is an apocalyptic number.

166648943 is a deficient number, since it is larger than the sum of its proper divisors (19090177).

166648943 is a wasteful number, since it uses less digits than its factorization.

166648943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515977.

The product of its digits is 746496, while the sum is 47.

The square root of 166648943 is about 12909.2580344495. The cubic root of 166648943 is about 550.3017000383.

The spelling of 166648943 in words is "one hundred sixty-six million, six hundred forty-eight thousand, nine hundred forty-three".