665548 has 12 divisors (see below), whose sum is σ = 1254400. Its totient is φ = 307152.

The previous prime is 665527. The next prime is 665549. The reversal of 665548 is 845566.

665548 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (665549) 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, 6348 + ... + 6451.

2⁶⁶⁵⁵⁴⁸ is an apocalyptic number.

It is an amenable number.

665548 is a deficient number, since it is larger than the sum of its proper divisors (588852).

665548 is a wasteful number, since it uses less digits than its factorization.

665548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12816 (or 12814 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 665548 is about 815.8112526804. The cubic root of 665548 is about 87.3091568505.

The spelling of 665548 in words is "six hundred sixty-five thousand, five hundred forty-eight".