106666217 has 4 divisors (see below), whose sum is σ = 121904256. Its totient is φ = 91428180.

The previous prime is 106666199. The next prime is 106666243. The reversal of 106666217 is 712666601.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 106666217 - 2⁸ = 106665961 is a prime.

It is a super-2 number, since 2×106666217² = 22755363698182178, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106666117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7619009 + ... + 7619022.

It is an arithmetic number, because the mean of its divisors is an integer number (30476064).

Almost surely, 2^106666217 is an apocalyptic number.

It is an amenable number.

106666217 is a deficient number, since it is larger than the sum of its proper divisors (15238039).

106666217 is an equidigital number, since it uses as much as digits as its factorization.

106666217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15238038.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 106666217 is about 10327.9338204696. The cubic root of 106666217 is about 474.2517741743.

The spelling of 106666217 in words is "one hundred six million, six hundred sixty-six thousand, two hundred seventeen".