665486 has 4 divisors (see below), whose sum is σ = 998232. Its totient is φ = 332742.

The previous prime is 665479. The next prime is 665501. The reversal of 665486 is 684566.

665486 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 684566 = 2 ⋅342283.

It is a plaindrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166370 + ... + 166373.

It is an arithmetic number, because the mean of its divisors is an integer number (249558).

2⁶⁶⁵⁴⁸⁶ is an apocalyptic number.

665486 is a deficient number, since it is larger than the sum of its proper divisors (332746).

665486 is a wasteful number, since it uses less digits than its factorization.

665486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332745.

The product of its digits is 34560, while the sum is 35.

The square root of 665486 is about 815.7732528099. The cubic root of 665486 is about 87.3064456332.

The spelling of 665486 in words is "six hundred sixty-five thousand, four hundred eighty-six".