665116 has 12 divisors (see below), whose sum is σ = 1170288. Its totient is φ = 330752.

The previous prime is 665113. The next prime is 665117. The reversal of 665116 is 611566.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 705 + ... + 1351.

It is an arithmetic number, because the mean of its divisors is an integer number (97524).

2⁶⁶⁵¹¹⁶ is an apocalyptic number.

It is an amenable number.

665116 is a deficient number, since it is larger than the sum of its proper divisors (505172).

665116 is a wasteful number, since it uses less digits than its factorization.

665116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908 (or 906 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

The square root of 665116 is about 815.5464425770. The cubic root of 665116 is about 87.2902622857.

The spelling of 665116 in words is "six hundred sixty-five thousand, one hundred sixteen".