135261566 has 16 divisors (see below), whose sum is σ = 227320560. Its totient is φ = 59820480.

The previous prime is 135261547. The next prime is 135261569. The reversal of 135261566 is 665162531.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135261569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82271 + ... + 83898.

It is an arithmetic number, because the mean of its divisors is an integer number (14207535).

Almost surely, 2^135261566 is an apocalyptic number.

135261566 is a deficient number, since it is larger than the sum of its proper divisors (92058994).

135261566 is a wasteful number, since it uses less digits than its factorization.

135261566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166219.

The product of its digits is 32400, while the sum is 35.

The square root of 135261566 is about 11630.2006001616. The cubic root of 135261566 is about 513.3238825306.

The spelling of 135261566 in words is "one hundred thirty-five million, two hundred sixty-one thousand, five hundred sixty-six".