663828479 has 4 divisors (see below), whose sum is σ = 698766840. Its totient is φ = 628890120.

The previous prime is 663828469. The next prime is 663828491. The reversal of 663828479 is 974828366.

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

It is not a de Polignac number, because 663828479 - 2⁴ = 663828463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 663828479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663828409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17469152 + ... + 17469189.

It is an arithmetic number, because the mean of its divisors is an integer number (174691710).

Almost surely, 2^663828479 is an apocalyptic number.

663828479 is a deficient number, since it is larger than the sum of its proper divisors (34938361).

663828479 is a wasteful number, since it uses less digits than its factorization.

663828479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34938360.

The product of its digits is 3483648, while the sum is 53.

The square root of 663828479 is about 25764.8690856367. The cubic root of 663828479 is about 872.3390086730.

The spelling of 663828479 in words is "six hundred sixty-three million, eight hundred twenty-eight thousand, four hundred seventy-nine".