135689666 has 32 divisors (see below), whose sum is σ = 248417280. Its totient is φ = 54331200.

The previous prime is 135689651. The next prime is 135689677. The reversal of 135689666 is 666986531.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7196 + ... + 17976.

It is an arithmetic number, because the mean of its divisors is an integer number (7763040).

Almost surely, 2^135689666 is an apocalyptic number.

135689666 is a deficient number, since it is larger than the sum of its proper divisors (112727614).

135689666 is a wasteful number, since it uses less digits than its factorization.

135689666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10850.

The product of its digits is 1399680, while the sum is 50.

The square root of 135689666 is about 11648.5907302128. The cubic root of 135689666 is about 513.8648652811.

The spelling of 135689666 in words is "one hundred thirty-five million, six hundred eighty-nine thousand, six hundred sixty-six".