135567666 has 48 divisors (see below), whose sum is σ = 321082944. Its totient is φ = 41085792.

The previous prime is 135567637. The next prime is 135567671. The reversal of 135567666 is 666765531.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11355 + ... + 20001.

It is an arithmetic number, because the mean of its divisors is an integer number (6689228).

Almost surely, 2^135567666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135567666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160541472).

135567666 is an abundant number, since it is smaller than the sum of its proper divisors (185515278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135567666 is a wasteful number, since it uses less digits than its factorization.

135567666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8735 (or 8732 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The square root of 135567666 is about 11643.3528676237. The cubic root of 135567666 is about 513.7108120072.

The spelling of 135567666 in words is "one hundred thirty-five million, five hundred sixty-seven thousand, six hundred sixty-six".