663431505134366 has 8 divisors (see below), whose sum is σ = 996966539709960. Its totient is φ = 331109325231048.

The previous prime is 663431505134353. The next prime is 663431505134393.

663431505134366 is nontrivially palindromic in base 10.

663431505134366 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303213666701 + ... + 303213668888.

It is an arithmetic number, because the mean of its divisors is an integer number (124620817463745).

Almost surely, 2^{663431505134366} is an apocalyptic number.

663431505134366 is a deficient number, since it is larger than the sum of its proper divisors (333535034575594).

663431505134366 is a wasteful number, since it uses less digits than its factorization.

663431505134366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606427336138.

The product of its (nonzero) digits is 41990400, while the sum is 56.

The spelling of 663431505134366 in words is "six hundred sixty-three trillion, four hundred thirty-one billion, five hundred five million, one hundred thirty-four thousand, three hundred sixty-six".