663344545443366 has 16 divisors (see below), whose sum is σ = 1327071752910144. Its totient is φ = 221051071477224.

The previous prime is 663344545443331. The next prime is 663344545443413.

It is a happy number.

663344545443366 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 663344545443297 and 663344545443306.

It is a congruent number.

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, 15944228440 + ... + 15944270043.

It is an arithmetic number, because the mean of its divisors is an integer number (82941984556884).

Almost surely, 2^{663344545443366} is an apocalyptic number.

663344545443366 is an abundant number, since it is smaller than the sum of its proper divisors (663727207466778).

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

663344545443366 is a wasteful number, since it uses less digits than its factorization.

663344545443366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31888501955.

The product of its digits is 2687385600, while the sum is 66.

The spelling of 663344545443366 in words is "six hundred sixty-three trillion, three hundred forty-four billion, five hundred forty-five million, four hundred forty-three thousand, three hundred sixty-six".