663794682408 has 384 divisors, whose sum is σ = 2354026147200. Its totient is φ = 165556224000.

The previous prime is 663794682367. The next prime is 663794682431. The reversal of 663794682408 is 804286497366.

663794682408 is a `hidden beast` number, since 6 + 63 + 7 + 94 + 6 + 82 + 408 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3225808 + ... + 3425408.

It is an arithmetic number, because the mean of its divisors is an integer number (6130276425).

Almost surely, 2^663794682408 is an apocalyptic number.

663794682408 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663794682408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1177013073600).

663794682408 is an abundant number, since it is smaller than the sum of its proper divisors (1690231464792).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663794682408 is a wasteful number, since it uses less digits than its factorization.

663794682408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199673 (or 199666 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 63.

The spelling of 663794682408 in words is "six hundred sixty-three billion, seven hundred ninety-four million, six hundred eighty-two thousand, four hundred eight".