665079 has 8 divisors (see below), whose sum is σ = 897792. Its totient is φ = 437880.

The previous prime is 665069. The next prime is 665089. The reversal of 665079 is 970566.

It is an interprime number because it is at equal distance from previous prime (665069) and next prime (665089).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 665079 - 2⁵ = 665047 is a prime.

It is a super-3 number, since 3×665079³ = 882553334328864117, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1087 + ... + 1584.

It is an arithmetic number, because the mean of its divisors is an integer number (112224).

2⁶⁶⁵⁰⁷⁹ is an apocalyptic number.

665079 is a deficient number, since it is larger than the sum of its proper divisors (232713).

665079 is a wasteful number, since it uses less digits than its factorization.

665079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2757.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 665079 is about 815.5237580843. The cubic root of 665079 is about 87.2886436209.

The spelling of 665079 in words is "six hundred sixty-five thousand, seventy-nine".