665491848 has 32 divisors (see below), whose sum is σ = 1901405760. Its totient is φ = 190140480.

The previous prime is 665491817. The next prime is 665491859. The reversal of 665491848 is 848194566.

It is a self number, because there is not a number n which added to its sum of digits gives 665491848.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1980463 + ... + 1980798.

It is an arithmetic number, because the mean of its divisors is an integer number (59418930).

Almost surely, 2^665491848 is an apocalyptic number.

It is an amenable number.

665491848 is an abundant number, since it is smaller than the sum of its proper divisors (1235913912).

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

665491848 is a wasteful number, since it uses less digits than its factorization.

665491848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3961277 (or 3961273 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 51.

The square root of 665491848 is about 25797.1286774323. The cubic root of 665491848 is about 873.0670136937.

The spelling of 665491848 in words is "six hundred sixty-five million, four hundred ninety-one thousand, eight hundred forty-eight".