166534059 has 4 divisors (see below), whose sum is σ = 222045416. Its totient is φ = 111022704.

The previous prime is 166534021. The next prime is 166534063. The reversal of 166534059 is 950435661.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 166534059 - 2¹⁹ = 166009771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166534079) 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 3 ways as a sum of consecutive naturals, for example, 27755674 + ... + 27755679.

It is an arithmetic number, because the mean of its divisors is an integer number (55511354).

Almost surely, 2^166534059 is an apocalyptic number.

166534059 is a deficient number, since it is larger than the sum of its proper divisors (55511357).

166534059 is an equidigital number, since it uses as much as digits as its factorization.

166534059 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55511356.

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 166534059 is about 12904.8075925215. The cubic root of 166534059 is about 550.1752158002.

The spelling of 166534059 in words is "one hundred sixty-six million, five hundred thirty-four thousand, fifty-nine".