665708106 has 32 divisors (see below), whose sum is σ = 1522483200. Its totient is φ = 190094256.

The previous prime is 665708093. The next prime is 665708123. The reversal of 665708106 is 601807566.

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, 97455 + ... + 104061.

It is an arithmetic number, because the mean of its divisors is an integer number (47577600).

Almost surely, 2^665708106 is an apocalyptic number.

665708106 is an abundant number, since it is smaller than the sum of its proper divisors (856775094).

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

665708106 is a wasteful number, since it uses less digits than its factorization.

665708106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9018.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 665708106 is about 25801.3198499612. The cubic root of 665708106 is about 873.1615739697.

The spelling of 665708106 in words is "six hundred sixty-five million, seven hundred eight thousand, one hundred six".