166363563685 has 24 divisors (see below), whose sum is σ = 219576913920. Its totient is φ = 120913388640.

The previous prime is 166363563649. The next prime is 166363563689. The reversal of 166363563685 is 586365363661.

It is not a de Polignac number, because 166363563685 - 2⁹ = 166363563173 is a prime.

It is a super-3 number, since 3×166363563685³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166363563689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 855004 + ... + 1031386.

It is an arithmetic number, because the mean of its divisors is an integer number (9149038080).

Almost surely, 2^166363563685 is an apocalyptic number.

It is an amenable number.

166363563685 is a deficient number, since it is larger than the sum of its proper divisors (53213350235).

166363563685 is a wasteful number, since it uses less digits than its factorization.

166363563685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177969 (or 177958 counting only the distinct ones).

The product of its digits is 41990400, while the sum is 58.

The spelling of 166363563685 in words is "one hundred sixty-six billion, three hundred sixty-three million, five hundred sixty-three thousand, six hundred eighty-five".