665041468 has 48 divisors (see below), whose sum is σ = 1434908160. Its totient is φ = 262632384.

The previous prime is 665041463. The next prime is 665041511. The reversal of 665041468 is 864140566.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 665041468.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665041463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269223 + ... + 271681.

It is an arithmetic number, because the mean of its divisors is an integer number (29893920).

Almost surely, 2^665041468 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 665041468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (717454080).

665041468 is an abundant number, since it is smaller than the sum of its proper divisors (769866692).

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

665041468 is a wasteful number, since it uses less digits than its factorization.

665041468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3226 (or 3224 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 665041468 is about 25788.3979339547. The cubic root of 665041468 is about 872.8700162099.

The spelling of 665041468 in words is "six hundred sixty-five million, forty-one thousand, four hundred sixty-eight".