665274 has 8 divisors (see below), whose sum is σ = 1330560. Its totient is φ = 221756.

The previous prime is 665267. The next prime is 665279. The reversal of 665274 is 472566.

665274 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

665274 is an admirable number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 665274.

It is not an unprimeable number, because it can be changed into a prime (665279) by changing a digit.

665274 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55434 + ... + 55445.

It is an arithmetic number, because the mean of its divisors is an integer number (166320).

2⁶⁶⁵²⁷⁴ is an apocalyptic number.

665274 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

665274 is a wasteful number, since it uses less digits than its factorization.

665274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110884.

The product of its digits is 10080, while the sum is 30.

The square root of 665274 is about 815.6433043923. The cubic root of 665274 is about 87.2971737465.

It can be divided in two parts, 665 and 274, that added together give a palindrome (939).

The spelling of 665274 in words is "six hundred sixty-five thousand, two hundred seventy-four".