135666047 has 12 divisors (see below), whose sum is σ = 151173120. Its totient is φ = 121635360.

The previous prime is 135665921. The next prime is 135666059. The reversal of 135666047 is 740666531.

It is a happy number.

135666047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 135666047 - 2¹² = 135661951 is a prime.

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 135666047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135066047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1154 + ... + 16512.

It is an arithmetic number, because the mean of its divisors is an integer number (12597760).

Almost surely, 2^135666047 is an apocalyptic number.

135666047 is a deficient number, since it is larger than the sum of its proper divisors (15507073).

135666047 is a wasteful number, since it uses less digits than its factorization.

135666047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15454 (or 15443 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 135666047 is about 11647.5768724658. The cubic root of 135666047 is about 513.8350480300.

The spelling of 135666047 in words is "one hundred thirty-five million, six hundred sixty-six thousand, forty-seven".