665148 has 24 divisors (see below), whose sum is σ = 1693440. Its totient is φ = 201520.

The previous prime is 665141. The next prime is 665153. The reversal of 665148 is 841566.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665141) by changing a digit.

665148 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 7 ways as a sum of consecutive naturals, for example, 2388 + ... + 2651.

It is an arithmetic number, because the mean of its divisors is an integer number (70560).

2⁶⁶⁵¹⁴⁸ is an apocalyptic number.

It is an amenable number.

665148 is an abundant number, since it is smaller than the sum of its proper divisors (1028292).

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

665148 is a wasteful number, since it uses less digits than its factorization.

665148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5057 (or 5055 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 665148 is about 815.5660610889. The cubic root of 665148 is about 87.2916621636.

The spelling of 665148 in words is "six hundred sixty-five thousand, one hundred forty-eight".