665541041 has 32 divisors (see below), whose sum is σ = 806547456. Its totient is φ = 541728000.

The previous prime is 665541011. The next prime is 665541059. The reversal of 665541041 is 140145566.

It is a de Polignac number, because none of the positive numbers 2^k-665541041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 665540989 and 665541007.

It is not an unprimeable number, because it can be changed into a prime (665541011) 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 31 ways as a sum of consecutive naturals, for example, 1165286 + ... + 1165856.

It is an arithmetic number, because the mean of its divisors is an integer number (25204608).

Almost surely, 2^665541041 is an apocalyptic number.

It is an amenable number.

665541041 is a deficient number, since it is larger than the sum of its proper divisors (141006415).

665541041 is a wasteful number, since it uses less digits than its factorization.

665541041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 893.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 665541041 is about 25798.0821186382. The cubic root of 665541041 is about 873.0885254661.

The spelling of 665541041 in words is "six hundred sixty-five million, five hundred forty-one thousand, forty-one".