665012 has 18 divisors (see below), whose sum is σ = 1209474. Its totient is φ = 319920.

The previous prime is 665011. The next prime is 665017. The reversal of 665012 is 210566.

It can be written as a sum of positive squares in only one way, i.e., 649636 + 15376 = 806^2 + 124^2 .

It is a plaindrome in base 14.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 665012.

It is not an unprimeable number, because it can be changed into a prime (665011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3758 + ... + 3930.

It is an arithmetic number, because the mean of its divisors is an integer number (67193).

2⁶⁶⁵⁰¹² is an apocalyptic number.

665012 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

665012 is a deficient number, since it is larger than the sum of its proper divisors (544462).

665012 is a wasteful number, since it uses less digits than its factorization.

665012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 665012 is about 815.4826791539. The cubic root of 665012 is about 87.2857123724.

Adding to 665012 its reverse (210566), we get a palindrome (875578).

It can be divided in two parts, 6650 and 12, that multiplied together give a triangular number (79800 = T₃₉₉).

The spelling of 665012 in words is "six hundred sixty-five thousand, twelve".