665596505 has 64 divisors (see below), whose sum is σ = 1006387200. Its totient is φ = 412335360.

The previous prime is 665596457. The next prime is 665596507. The reversal of 665596505 is 505695566.

665596505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 665596505 - 2¹⁰ = 665595481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665596505.

It is not an unprimeable number, because it can be changed into a prime (665596507) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1710851 + ... + 1711239.

It is an arithmetic number, because the mean of its divisors is an integer number (15724800).

Almost surely, 2^665596505 is an apocalyptic number.

It is an amenable number.

665596505 is a deficient number, since it is larger than the sum of its proper divisors (340790695).

665596505 is a wasteful number, since it uses less digits than its factorization.

665596505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534.

The product of its (nonzero) digits is 1215000, while the sum is 47.

The square root of 665596505 is about 25799.1570598731. The cubic root of 665596505 is about 873.1127782338.

The spelling of 665596505 in words is "six hundred sixty-five million, five hundred ninety-six thousand, five hundred five".