663304026 has 64 divisors (see below), whose sum is σ = 1656990720. Its totient is φ = 171970560.

The previous prime is 663304013. The next prime is 663304043. The reversal of 663304026 is 620403366.

It is a junction number, because it is equal to n+sod(n) for n = 663303984 and 663304002.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 354345 + ... + 356211.

It is an arithmetic number, because the mean of its divisors is an integer number (25890480).

Almost surely, 2^663304026 is an apocalyptic number.

663304026 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 663304026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (828495360).

663304026 is an abundant number, since it is smaller than the sum of its proper divisors (993686694).

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

663304026 is a wasteful number, since it uses less digits than its factorization.

663304026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659.

The product of its (nonzero) digits is 15552, while the sum is 30.

The square root of 663304026 is about 25754.6893982436. The cubic root of 663304026 is about 872.1092197243.

The spelling of 663304026 in words is "six hundred sixty-three million, three hundred four thousand, twenty-six".