135607661 has 8 divisors (see below), whose sum is σ = 155387904. Its totient is φ = 115929360.

The previous prime is 135607639. The next prime is 135607673. The reversal of 135607661 is 166706531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135607661 - 2²² = 131413357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135607061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22610 + ... + 27971.

It is an arithmetic number, because the mean of its divisors is an integer number (19423488).

Almost surely, 2^135607661 is an apocalyptic number.

It is an amenable number.

135607661 is a deficient number, since it is larger than the sum of its proper divisors (19780243).

135607661 is an equidigital number, since it uses as much as digits as its factorization.

135607661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50971.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 135607661 is about 11645.0702445284. The cubic root of 135607661 is about 513.7613251431.

The spelling of 135607661 in words is "one hundred thirty-five million, six hundred seven thousand, six hundred sixty-one".