665612135 has 8 divisors (see below), whose sum is σ = 845719056. Its totient is φ = 501166720.

The previous prime is 665612113. The next prime is 665612141. The reversal of 665612135 is 531216566.

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

It is not a de Polignac number, because 665612135 - 2¹⁴ = 665595751 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 665612095 and 665612104.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3915281 + ... + 3915450.

It is an arithmetic number, because the mean of its divisors is an integer number (105714882).

Almost surely, 2^665612135 is an apocalyptic number.

665612135 is a deficient number, since it is larger than the sum of its proper divisors (180106921).

665612135 is a wasteful number, since it uses less digits than its factorization.

665612135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7830753.

The product of its digits is 32400, while the sum is 35.

The square root of 665612135 is about 25799.4599749685. The cubic root of 665612135 is about 873.1196125275.

The spelling of 665612135 in words is "six hundred sixty-five million, six hundred twelve thousand, one hundred thirty-five".