663803162668 has 6 divisors (see below), whose sum is σ = 1161655534676. Its totient is φ = 331901581332.

The previous prime is 663803162609. The next prime is 663803162669. The reversal of 663803162668 is 866261308366.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (663803162669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82975395330 + ... + 82975395337.

Almost surely, 2^663803162668 is an apocalyptic number.

It is an amenable number.

663803162668 is a deficient number, since it is larger than the sum of its proper divisors (497852372008).

663803162668 is a wasteful number, since it uses less digits than its factorization.

663803162668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165950790671 (or 165950790669 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 55.

The spelling of 663803162668 in words is "six hundred sixty-three billion, eight hundred three million, one hundred sixty-two thousand, six hundred sixty-eight".