106663509 has 24 divisors (see below), whose sum is σ = 159868800. Its totient is φ = 68477760.

The previous prime is 106663477. The next prime is 106663517. The reversal of 106663509 is 905366601.

It is not a de Polignac number, because 106663509 - 2⁵ = 106663477 is a prime.

It is a super-2 number, since 2×106663509² = 22754208304386162, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (106663589) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27322 + ... + 30980.

It is an arithmetic number, because the mean of its divisors is an integer number (6661200).

Almost surely, 2^106663509 is an apocalyptic number.

It is an amenable number.

106663509 is a deficient number, since it is larger than the sum of its proper divisors (53205291).

106663509 is a wasteful number, since it uses less digits than its factorization.

106663509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3785 (or 3782 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 106663509 is about 10327.8027188749. The cubic root of 106663509 is about 474.2477607677.

The spelling of 106663509 in words is "one hundred six million, six hundred sixty-three thousand, five hundred nine".