166016543 has 16 divisors (see below), whose sum is σ = 219158784. Its totient is φ = 121752960.

The previous prime is 166016519. The next prime is 166016551. The reversal of 166016543 is 345610661.

It is not a de Polignac number, because 166016543 - 2⁸ = 166016287 is a prime.

It is a super-2 number, since 2×166016543² = 55122985099341698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166016143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62105 + ... + 64722.

It is an arithmetic number, because the mean of its divisors is an integer number (13697424).

Almost surely, 2^166016543 is an apocalyptic number.

166016543 is a deficient number, since it is larger than the sum of its proper divisors (53142241).

166016543 is a wasteful number, since it uses less digits than its factorization.

166016543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126862.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 166016543 is about 12884.7407036385. The cubic root of 166016543 is about 549.6047220475.

The spelling of 166016543 in words is "one hundred sixty-six million, sixteen thousand, five hundred forty-three".