665134 has 4 divisors (see below), whose sum is σ = 997704. Its totient is φ = 332566.

The previous prime is 665131. The next prime is 665141. The reversal of 665134 is 431566.

It is a semiprime because it is the product of two primes.

It is a plaindrome in base 9 and base 14.

It is a junction number, because it is equal to n+sod(n) for n = 665099 and 665108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166282 + ... + 166285.

It is an arithmetic number, because the mean of its divisors is an integer number (249426).

2⁶⁶⁵¹³⁴ is an apocalyptic number.

665134 is a deficient number, since it is larger than the sum of its proper divisors (332570).

665134 is a wasteful number, since it uses less digits than its factorization.

665134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332569.

The product of its digits is 2160, while the sum is 25.

The square root of 665134 is about 815.5574780480. The cubic root of 665134 is about 87.2910497226.

The spelling of 665134 in words is "six hundred sixty-five thousand, one hundred thirty-four".