106663681 has 8 divisors (see below), whose sum is σ = 108633600. Its totient is φ = 104699280.

The previous prime is 106663657. The next prime is 106663691. The reversal of 106663681 is 186366601.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 106663681 - 2⁷ = 106663553 is a prime.

It is a super-2 number, since 2×106663681² = 22754281688939522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 106663681.

It is not an unprimeable number, because it can be changed into a prime (106663621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71776 + ... + 73246.

It is an arithmetic number, because the mean of its divisors is an integer number (13579200).

Almost surely, 2^106663681 is an apocalyptic number.

It is an amenable number.

106663681 is a deficient number, since it is larger than the sum of its proper divisors (1969919).

106663681 is a wasteful number, since it uses less digits than its factorization.

106663681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2759.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 106663681 is about 10327.8110459090. The cubic root of 106663681 is about 474.2480156833.

The spelling of 106663681 in words is "one hundred six million, six hundred sixty-three thousand, six hundred eighty-one".