663242417 has 4 divisors (see below), whose sum is σ = 663409956. Its totient is φ = 663074880.

The previous prime is 663242399. The next prime is 663242483. The reversal of 663242417 is 714242366.

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 492129856 + 171112561 = 22184^2 + 13081^2 .

It is a cyclic number.

It is not a de Polignac number, because 663242417 - 2¹⁴ = 663226033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663242497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77684 + ... + 85797.

It is an arithmetic number, because the mean of its divisors is an integer number (165852489).

Almost surely, 2^663242417 is an apocalyptic number.

It is an amenable number.

663242417 is a deficient number, since it is larger than the sum of its proper divisors (167539).

663242417 is a wasteful number, since it uses less digits than its factorization.

663242417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167538.

The product of its digits is 48384, while the sum is 35.

The square root of 663242417 is about 25753.4932970267. The cubic root of 663242417 is about 872.0822178074.

The spelling of 663242417 in words is "six hundred sixty-three million, two hundred forty-two thousand, four hundred seventeen".