665411241 has 16 divisors (see below), whose sum is σ = 983740608. Its totient is φ = 396667200.

The previous prime is 665411231. The next prime is 665411267. The reversal of 665411241 is 142114566.

It is not a de Polignac number, because 665411241 - 2¹⁵ = 665378473 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 665411199 and 665411208.

It is not an unprimeable number, because it can be changed into a prime (665411221) 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 15 ways as a sum of consecutive naturals, for example, 163266 + ... + 167291.

It is an arithmetic number, because the mean of its divisors is an integer number (61483788).

Almost surely, 2^665411241 is an apocalyptic number.

665411241 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

665411241 is a deficient number, since it is larger than the sum of its proper divisors (318329367).

665411241 is a wasteful number, since it uses less digits than its factorization.

665411241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330632.

The product of its digits is 5760, while the sum is 30.

The square root of 665411241 is about 25795.5663050843. The cubic root of 665411241 is about 873.0317624959.

The spelling of 665411241 in words is "six hundred sixty-five million, four hundred eleven thousand, two hundred forty-one".