668317437063 has 32 divisors (see below), whose sum is σ = 993153208320. Its totient is φ = 444172783680.

The previous prime is 668317437041. The next prime is 668317437071. The reversal of 668317437063 is 360734713866.

668317437063 is a `hidden beast` number, since 66 + 83 + 17 + 437 + 0 + 63 = 666.

It is not a de Polignac number, because 668317437063 - 2¹⁷ = 668317305991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668317437863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13681603 + ... + 13730363.

It is an arithmetic number, because the mean of its divisors is an integer number (31036037760).

Almost surely, 2^668317437063 is an apocalyptic number.

668317437063 is a deficient number, since it is larger than the sum of its proper divisors (324835771257).

668317437063 is a wasteful number, since it uses less digits than its factorization.

668317437063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50324 (or 50318 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 54.

The spelling of 668317437063 in words is "six hundred sixty-eight billion, three hundred seventeen million, four hundred thirty-seven thousand, sixty-three".