412641665 has 4 divisors (see below), whose sum is σ = 495170004. Its totient is φ = 330113328.

The previous prime is 412641659. The next prime is 412641679. The reversal of 412641665 is 566146214.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 117592336 + 295049329 = 10844^2 + 17177^2 .

It is a cyclic number.

It is not a de Polignac number, because 412641665 - 2¹² = 412637569 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41264162 + ... + 41264171.

It is an arithmetic number, because the mean of its divisors is an integer number (123792501).

Almost surely, 2^412641665 is an apocalyptic number.

It is an amenable number.

412641665 is a deficient number, since it is larger than the sum of its proper divisors (82528339).

412641665 is an equidigital number, since it uses as much as digits as its factorization.

412641665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82528338.

The product of its digits is 34560, while the sum is 35.

The square root of 412641665 is about 20313.5832634225. The cubic root of 412641665 is about 744.4879835471.

Adding to 412641665 its reverse (566146214), we get a palindrome (978787879).

The spelling of 412641665 in words is "four hundred twelve million, six hundred forty-one thousand, six hundred sixty-five".