135660566 has 4 divisors (see below), whose sum is σ = 203490852. Its totient is φ = 67830282.

The previous prime is 135660559. The next prime is 135660593. The reversal of 135660566 is 665066531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 665066531 = 3061 ⋅217271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33915140 + ... + 33915143.

It is an arithmetic number, because the mean of its divisors is an integer number (50872713).

Almost surely, 2^135660566 is an apocalyptic number.

135660566 is a deficient number, since it is larger than the sum of its proper divisors (67830286).

135660566 is an equidigital number, since it uses as much as digits as its factorization.

135660566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67830285.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 135660566 is about 11647.3415851000. The cubic root of 135660566 is about 513.8281281757.

The spelling of 135660566 in words is "one hundred thirty-five million, six hundred sixty thousand, five hundred sixty-six".