166061559 has 16 divisors (see below), whose sum is σ = 235261152. Its totient is φ = 103830528.

The previous prime is 166061557. The next prime is 166061563. The reversal of 166061559 is 955160661.

It is not a de Polignac number, because 166061559 - 2¹ = 166061557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166061557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9387 + ... + 20499.

It is an arithmetic number, because the mean of its divisors is an integer number (14703822).

Almost surely, 2^166061559 is an apocalyptic number.

166061559 is a deficient number, since it is larger than the sum of its proper divisors (69199593).

166061559 is a wasteful number, since it uses less digits than its factorization.

166061559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11426.

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 166061559 is about 12886.4874577986. The cubic root of 166061559 is about 549.6543933430.

The spelling of 166061559 in words is "one hundred sixty-six million, sixty-one thousand, five hundred fifty-nine".