166255533 has 12 divisors (see below), whose sum is σ = 246004668. Its totient is φ = 108133440.

The previous prime is 166255513. The next prime is 166255549. The reversal of 166255533 is 335552661.

166255533 is a `hidden beast` number, since 16 + 62 + 55 + 533 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14152644 + 152102889 = 3762^2 + 12333^2 .

It is not a de Polignac number, because 166255533 - 2⁸ = 166255277 is a prime.

It is a super-2 number, since 2×166255533² = 55281804506228178, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166255513) 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, 224910 + ... + 225647.

It is an arithmetic number, because the mean of its divisors is an integer number (20500389).

Almost surely, 2^166255533 is an apocalyptic number.

It is an amenable number.

166255533 is a deficient number, since it is larger than the sum of its proper divisors (79749135).

166255533 is a wasteful number, since it uses less digits than its factorization.

166255533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450604 (or 450601 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The square root of 166255533 is about 12894.0115169795. The cubic root of 166255533 is about 549.8683244009.

The spelling of 166255533 in words is "one hundred sixty-six million, two hundred fifty-five thousand, five hundred thirty-three".