663828481 has 4 divisors (see below), whose sum is σ = 667537200. Its totient is φ = 660119764.

The previous prime is 663828469. The next prime is 663828491. The reversal of 663828481 is 184828366.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 184828366 = 2 ⋅92414183.

It is a cyclic number.

It is not a de Polignac number, because 663828481 - 2⁷ = 663828353 is a prime.

It is a super-2 number, since 2×663828481² = 881336504373534722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663828491) by changing a digit.

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, 1854091 + ... + 1854448.

It is an arithmetic number, because the mean of its divisors is an integer number (166884300).

Almost surely, 2^663828481 is an apocalyptic number.

It is an amenable number.

663828481 is a deficient number, since it is larger than the sum of its proper divisors (3708719).

663828481 is a wasteful number, since it uses less digits than its factorization.

663828481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3708718.

The product of its digits is 442368, while the sum is 46.

The square root of 663828481 is about 25764.8691244493. The cubic root of 663828481 is about 872.3390095490.

The spelling of 663828481 in words is "six hundred sixty-three million, eight hundred twenty-eight thousand, four hundred eighty-one".