135666485 has 16 divisors (see below), whose sum is σ = 168167664. Its totient is φ = 105011712.

The previous prime is 135666481. The next prime is 135666493. The reversal of 135666485 is 584666531.

It can be written as a sum of positive squares in 8 ways, for example, as 9351364 + 126315121 = 3058^2 + 11239^2 .

It is a cyclic number.

It is not a de Polignac number, because 135666485 - 2² = 135666481 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135666481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15839 + ... + 22851.

It is an arithmetic number, because the mean of its divisors is an integer number (10510479).

Almost surely, 2^135666485 is an apocalyptic number.

It is an amenable number.

135666485 is a deficient number, since it is larger than the sum of its proper divisors (32501179).

135666485 is an equidigital number, since it uses as much as digits as its factorization.

135666485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7144.

The product of its digits is 518400, while the sum is 44.

The square root of 135666485 is about 11647.5956746446. The cubic root of 135666485 is about 513.8356010043.

The spelling of 135666485 in words is "one hundred thirty-five million, six hundred sixty-six thousand, four hundred eighty-five".