166656533 has 16 divisors (see below), whose sum is σ = 176472000. Its totient is φ = 157151232.

The previous prime is 166656499. The next prime is 166656541. The reversal of 166656533 is 335656661.

It is not a de Polignac number, because 166656533 - 2¹⁰ = 166655509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166656563) 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 15 ways as a sum of consecutive naturals, for example, 439538 + ... + 439916.

It is an arithmetic number, because the mean of its divisors is an integer number (11029500).

Almost surely, 2^166656533 is an apocalyptic number.

It is an amenable number.

166656533 is a deficient number, since it is larger than the sum of its proper divisors (9815467).

166656533 is a wasteful number, since it uses less digits than its factorization.

166656533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724.

The product of its digits is 291600, while the sum is 41.

The square root of 166656533 is about 12909.5520061697. The cubic root of 166656533 is about 550.3100543797.

The spelling of 166656533 in words is "one hundred sixty-six million, six hundred fifty-six thousand, five hundred thirty-three".