665124441 has 24 divisors (see below), whose sum is σ = 909024480. Its totient is φ = 432531456.

The previous prime is 665124413. The next prime is 665124443. The reversal of 665124441 is 144421566.

It is not a de Polignac number, because 665124441 - 2⁵ = 665124409 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (665124443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3715690 + ... + 3715868.

It is an arithmetic number, because the mean of its divisors is an integer number (37876020).

Almost surely, 2^665124441 is an apocalyptic number.

It is an amenable number.

665124441 is a deficient number, since it is larger than the sum of its proper divisors (243900039).

665124441 is a wasteful number, since it uses less digits than its factorization.

665124441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505 (or 392 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 665124441 is about 25790.0066110887. The cubic root of 665124441 is about 872.9063155163.

The spelling of 665124441 in words is "six hundred sixty-five million, one hundred twenty-four thousand, four hundred forty-one".