665505535 has 8 divisors (see below), whose sum is σ = 798786576. Its totient is φ = 532284480.

The previous prime is 665505523. The next prime is 665505553. The reversal of 665505535 is 535505566.

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

It is not a de Polignac number, because 665505535 - 2²⁷ = 531287807 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14800 + ... + 39370.

It is an arithmetic number, because the mean of its divisors is an integer number (99848322).

Almost surely, 2^665505535 is an apocalyptic number.

665505535 is a deficient number, since it is larger than the sum of its proper divisors (133281041).

665505535 is a wasteful number, since it uses less digits than its factorization.

665505535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29993.

The product of its (nonzero) digits is 337500, while the sum is 40.

The square root of 665505535 is about 25797.3939575299. The cubic root of 665505535 is about 873.0729990344.

The spelling of 665505535 in words is "six hundred sixty-five million, five hundred five thousand, five hundred thirty-five".