164166543 has 12 divisors (see below), whose sum is σ = 237989128. Its totient is φ = 109047600.

The previous prime is 164166539. The next prime is 164166547. The reversal of 164166543 is 345661461.

It is a happy number.

164166543 is a `hidden beast` number, since 1 + 641 + 6 + 6 + 5 + 4 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (164166539) and next prime (164166547).

It is not a de Polignac number, because 164166543 - 2² = 164166539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 164166498 and 164166507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164166547) 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 11 ways as a sum of consecutive naturals, for example, 30433 + ... + 35418.

Almost surely, 2^164166543 is an apocalyptic number.

164166543 is a deficient number, since it is larger than the sum of its proper divisors (73822585).

164166543 is a wasteful number, since it uses less digits than its factorization.

164166543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66134 (or 66131 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 164166543 is about 12812.7492366002. The cubic root of 164166543 is about 547.5555907775. Note that the first 4 decimals are identical.

The spelling of 164166543 in words is "one hundred sixty-four million, one hundred sixty-six thousand, five hundred forty-three".