665019748 has 12 divisors (see below), whose sum is σ = 1176861420. Its totient is φ = 328773632.

The previous prime is 665019721. The next prime is 665019749. The reversal of 665019748 is 847910566.

665019748 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 294534244 + 370485504 = 17162^2 + 19248^2 .

It is a junction number, because it is equal to n+sod(n) for n = 665019698 and 665019707.

It is not an unprimeable number, because it can be changed into a prime (665019749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 933661 + ... + 934372.

It is an arithmetic number, because the mean of its divisors is an integer number (98071785).

Almost surely, 2^665019748 is an apocalyptic number.

It is an amenable number.

665019748 is a deficient number, since it is larger than the sum of its proper divisors (511841672).

665019748 is a wasteful number, since it uses less digits than its factorization.

665019748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868126 (or 1868124 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 665019748 is about 25787.9768109094. The cubic root of 665019748 is about 872.8605135728.

The spelling of 665019748 in words is "six hundred sixty-five million, nineteen thousand, seven hundred forty-eight".