665364 has 36 divisors (see below), whose sum is σ = 1794464. Its totient is φ = 187968.

The previous prime is 665359. The next prime is 665369. The reversal of 665364 is 463566.

It is an interprime number because it is at equal distance from previous prime (665359) and next prime (665369).

665364 is a Rhonda number in base 8.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 665364.

It is not an unprimeable number, because it can be changed into a prime (665369) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7432 + ... + 7520.

2⁶⁶⁵³⁶⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 665364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (897232).

665364 is an abundant number, since it is smaller than the sum of its proper divisors (1129100).

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

665364 is a wasteful number, since it uses less digits than its factorization.

665364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 101 counting only the distinct ones).

The product of its digits is 12960, while the sum is 30.

The square root of 665364 is about 815.6984737021. The cubic root of 665364 is about 87.3011101654.

The spelling of 665364 in words is "six hundred sixty-five thousand, three hundred sixty-four".