166517816 has 8 divisors (see below), whose sum is σ = 312220920. Its totient is φ = 83258904.

The previous prime is 166517789. The next prime is 166517831. The reversal of 166517816 is 618715661.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10407356 + ... + 10407371.

It is an arithmetic number, because the mean of its divisors is an integer number (39027615).

Almost surely, 2^166517816 is an apocalyptic number.

It is an amenable number.

166517816 is a deficient number, since it is larger than the sum of its proper divisors (145703104).

166517816 is a wasteful number, since it uses less digits than its factorization.

166517816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20814733 (or 20814729 counting only the distinct ones).

The product of its digits is 60480, while the sum is 41.

The square root of 166517816 is about 12904.1782380747. The cubic root of 166517816 is about 550.1573279946.

The spelling of 166517816 in words is "one hundred sixty-six million, five hundred seventeen thousand, eight hundred sixteen".