665557135 has 16 divisors (see below), whose sum is σ = 826060032. Its totient is φ = 514252800.

The previous prime is 665557129. The next prime is 665557171. The reversal of 665557135 is 531755566.

It is not a de Polignac number, because 665557135 - 2¹³ = 665548943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665557091 and 665557100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79887 + ... + 87823.

It is an arithmetic number, because the mean of its divisors is an integer number (51628752).

Almost surely, 2^665557135 is an apocalyptic number.

665557135 is a deficient number, since it is larger than the sum of its proper divisors (160502897).

665557135 is a wasteful number, since it uses less digits than its factorization.

665557135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8514.

The product of its digits is 472500, while the sum is 43.

The square root of 665557135 is about 25798.3940391645. The cubic root of 665557135 is about 873.0955630353.

The spelling of 665557135 in words is "six hundred sixty-five million, five hundred fifty-seven thousand, one hundred thirty-five".