135665748 has 18 divisors (see below), whose sum is σ = 342932954. Its totient is φ = 45221904.

The previous prime is 135665737. The next prime is 135665749. The reversal of 135665748 is 847566531.

135665748 is a `hidden beast` number, since 13 + 5 + 66 + 574 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 90668484 + 44997264 = 9522^2 + 6708^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135665749) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1884211 + ... + 1884282.

Almost surely, 2^135665748 is an apocalyptic number.

135665748 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

135665748 is an abundant number, since it is smaller than the sum of its proper divisors (207267206).

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

135665748 is a wasteful number, since it uses less digits than its factorization.

135665748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3768503 (or 3768498 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 135665748 is about 11647.5640371710. The cubic root of 135665748 is about 513.8346705423.

The spelling of 135665748 in words is "one hundred thirty-five million, six hundred sixty-five thousand, seven hundred forty-eight".