665714 has 12 divisors (see below), whose sum is σ = 1161774. Its totient is φ = 285264.

The previous prime is 665713. The next prime is 665719. The reversal of 665714 is 417566.

It can be written as a sum of positive squares in only one way, i.e., 648025 + 17689 = 805^2 + 133^2 .

It is not an unprimeable number, because it can be changed into a prime (665713) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3299 + ... + 3494.

2⁶⁶⁵⁷¹⁴ is an apocalyptic number.

665714 is a deficient number, since it is larger than the sum of its proper divisors (496060).

665714 is a wasteful number, since it uses less digits than its factorization.

665714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6809 (or 6802 counting only the distinct ones).

The product of its digits is 5040, while the sum is 29.

The square root of 665714 is about 815.9129855567. The cubic root of 665714 is about 87.3164150874.

The spelling of 665714 in words is "six hundred sixty-five thousand, seven hundred fourteen".