135066691 has 4 divisors (see below), whose sum is σ = 135374800. Its totient is φ = 134758584.

The previous prime is 135066689. The next prime is 135066697. The reversal of 135066691 is 196660531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 196660531 = 941 ⋅208991.

It is a cyclic number.

It is not a de Polignac number, because 135066691 - 2¹ = 135066689 is a prime.

It is a super-2 number, since 2×135066691² = 36486022035378962, which contains 22 as substring.

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 135066691.

It is not an unprimeable number, because it can be changed into a prime (135066697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153396 + ... + 154273.

It is an arithmetic number, because the mean of its divisors is an integer number (33843700).

Almost surely, 2^135066691 is an apocalyptic number.

135066691 is a deficient number, since it is larger than the sum of its proper divisors (308109).

135066691 is an equidigital number, since it uses as much as digits as its factorization.

135066691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308108.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 135066691 is about 11621.8196079616. The cubic root of 135066691 is about 513.0772441750.

The spelling of 135066691 in words is "one hundred thirty-five million, sixty-six thousand, six hundred ninety-one".