106666689 has 8 divisors (see below), whose sum is σ = 143481312. Its totient is φ = 70481600.

The previous prime is 106666673. The next prime is 106666723. The reversal of 106666689 is 986666601.

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 106666689 - 2⁴ = 106666673 is a prime.

It is a super-2 number, since 2×106666689² = 22755565084445442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (106666639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156987 + ... + 157664.

It is an arithmetic number, because the mean of its divisors is an integer number (17935164).

Almost surely, 2^106666689 is an apocalyptic number.

It is an amenable number.

106666689 is a deficient number, since it is larger than the sum of its proper divisors (36814623).

106666689 is a wasteful number, since it uses less digits than its factorization.

106666689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314767.

The product of its (nonzero) digits is 559872, while the sum is 48.

The square root of 106666689 is about 10327.9566710942. The cubic root of 106666689 is about 474.2524736975.

The spelling of 106666689 in words is "one hundred six million, six hundred sixty-six thousand, six hundred eighty-nine".