665113312 has 12 divisors (see below), whose sum is σ = 1309441896. Its totient is φ = 332556640.

The previous prime is 665113301. The next prime is 665113349. The reversal of 665113312 is 213311566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10392364 + ... + 10392427.

It is an arithmetic number, because the mean of its divisors is an integer number (109120158).

Almost surely, 2^665113312 is an apocalyptic number.

It is an amenable number.

665113312 is a deficient number, since it is larger than the sum of its proper divisors (644328584).

665113312 is a wasteful number, since it uses less digits than its factorization.

665113312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20784801 (or 20784793 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 665113312 is about 25789.7908483183. The cubic root of 665113312 is about 872.9014469394.

Adding to 665113312 its reverse (213311566), we get a palindrome (878424878).

The spelling of 665113312 in words is "six hundred sixty-five million, one hundred thirteen thousand, three hundred twelve".