663546472734426 has 16 divisors (see below), whose sum is σ = 1328509266659904. Its totient is φ = 220946104046304.

The previous prime is 663546472734389. The next prime is 663546472734463. The reversal of 663546472734426 is 624437274645366.

It is an interprime number because it is at equal distance from previous prime (663546472734389) and next prime (663546472734463).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59013376870 + ... + 59013388113.

It is an arithmetic number, because the mean of its divisors is an integer number (83031829166244).

Almost surely, 2^{663546472734426} is an apocalyptic number.

663546472734426 is an abundant number, since it is smaller than the sum of its proper divisors (664962793925478).

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

663546472734426 is a wasteful number, since it uses less digits than its factorization.

663546472734426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118026765925.

The product of its digits is 2926264320, while the sum is 69.

The spelling of 663546472734426 in words is "six hundred sixty-three trillion, five hundred forty-six billion, four hundred seventy-two million, seven hundred thirty-four thousand, four hundred twenty-six".