665148828 has 36 divisors (see below), whose sum is σ = 1560230168. Its totient is φ = 220548480.

The previous prime is 665148821. The next prime is 665148839. The reversal of 665148828 is 828841566.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665148821) 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 11 ways as a sum of consecutive naturals, for example, 650958 + ... + 651978.

Almost surely, 2^665148828 is an apocalyptic number.

It is an amenable number.

665148828 is an abundant number, since it is smaller than the sum of its proper divisors (895081340).

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

665148828 is a wasteful number, since it uses less digits than its factorization.

665148828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494 (or 1259 counting only the distinct ones).

The product of its digits is 737280, while the sum is 48.

The square root of 665148828 is about 25790.4794061685. The cubic root of 665148828 is about 872.9169838489.

The spelling of 665148828 in words is "six hundred sixty-five million, one hundred forty-eight thousand, eight hundred twenty-eight".