665395104 has 96 divisors (see below), whose sum is σ = 1916006400. Its totient is φ = 200518400.

The previous prime is 665395091. The next prime is 665395127. The reversal of 665395104 is 401593566.

665395104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×665395104³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200047 + ... + 203345.

It is an arithmetic number, because the mean of its divisors is an integer number (19958400).

Almost surely, 2^665395104 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 665395104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (958003200).

665395104 is an abundant number, since it is smaller than the sum of its proper divisors (1250611296).

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

665395104 is a wasteful number, since it uses less digits than its factorization.

665395104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3514 (or 3506 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 39.

The square root of 665395104 is about 25795.2535168779. The cubic root of 665395104 is about 873.0247050921.

The spelling of 665395104 in words is "six hundred sixty-five million, three hundred ninety-five thousand, one hundred four".