135564666 has 16 divisors (see below), whose sum is σ = 271335744. Its totient is φ = 45153824.

The previous prime is 135564661. The next prime is 135564679. The reversal of 135564666 is 666465531.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (135564661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 715 + ... + 16481.

It is an arithmetic number, because the mean of its divisors is an integer number (16958484).

Almost surely, 2^135564666 is an apocalyptic number.

135564666 is an abundant number, since it is smaller than the sum of its proper divisors (135771078).

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

135564666 is a wasteful number, since it uses less digits than its factorization.

135564666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17205.

The product of its digits is 388800, while the sum is 42.

The square root of 135564666 is about 11643.2240380403. The cubic root of 135564666 is about 513.7070226479.

The spelling of 135564666 in words is "one hundred thirty-five million, five hundred sixty-four thousand, six hundred sixty-six".