106666559 has 4 divisors (see below), whose sum is σ = 106721160. Its totient is φ = 106611960.

The previous prime is 106666541. The next prime is 106666583. The reversal of 106666559 is 955666601.

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

It is a cyclic number.

It is not a de Polignac number, because 106666559 - 2¹² = 106662463 is a prime.

It is a super-3 number, since 3×106666559³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106666529) 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, 24257 + ... + 28314.

It is an arithmetic number, because the mean of its divisors is an integer number (26680290).

Almost surely, 2^106666559 is an apocalyptic number.

106666559 is a deficient number, since it is larger than the sum of its proper divisors (54601).

106666559 is an equidigital number, since it uses as much as digits as its factorization.

106666559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54600.

The product of its (nonzero) digits is 291600, while the sum is 44.

The square root of 106666559 is about 10327.9503774950. The cubic root of 106666559 is about 474.2522810324.

The spelling of 106666559 in words is "one hundred six million, six hundred sixty-six thousand, five hundred fifty-nine".