663109443426 has 32 divisors (see below), whose sum is σ = 1338827185728. Its totient is φ = 218935758080.

The previous prime is 663109443397. The next prime is 663109443439. The reversal of 663109443426 is 624344901366.

663109443426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4107286 + ... + 4265678.

It is an arithmetic number, because the mean of its divisors is an integer number (41838349554).

Almost surely, 2^663109443426 is an apocalyptic number.

663109443426 is an abundant number, since it is smaller than the sum of its proper divisors (675717742302).

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

663109443426 is a wasteful number, since it uses less digits than its factorization.

663109443426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165026.

The product of its (nonzero) digits is 2239488, while the sum is 48.

The spelling of 663109443426 in words is "six hundred sixty-three billion, one hundred nine million, four hundred forty-three thousand, four hundred twenty-six".