665576448 has 176 divisors, whose sum is σ = 1902236160. Its totient is φ = 206438400.

The previous prime is 665576437. The next prime is 665576453. The reversal of 665576448 is 844675566.

It is a self number, because there is not a number n which added to its sum of digits gives 665576448.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2761608 + ... + 2761848.

It is an arithmetic number, because the mean of its divisors is an integer number (10808160).

Almost surely, 2^665576448 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 665576448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (951118080).

665576448 is an abundant number, since it is smaller than the sum of its proper divisors (1236659712).

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

665576448 is a wasteful number, since it uses less digits than its factorization.

665576448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 306 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 51.

The square root of 665576448 is about 25798.7683426942. The cubic root of 665576448 is about 873.1040080561.

The spelling of 665576448 in words is "six hundred sixty-five million, five hundred seventy-six thousand, four hundred forty-eight".