668032608287 has 24 divisors (see below), whose sum is σ = 758087232000. Its totient is φ = 587621350800.

The previous prime is 668032608239. The next prime is 668032608289. The reversal of 668032608287 is 782806230866.

668032608287 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 668032608287 - 2⁶ = 668032608223 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668032608289) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39373268 + ... + 39390230.

It is an arithmetic number, because the mean of its divisors is an integer number (31586968000).

Almost surely, 2^668032608287 is an apocalyptic number.

668032608287 is a deficient number, since it is larger than the sum of its proper divisors (90054623713).

668032608287 is a wasteful number, since it uses less digits than its factorization.

668032608287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27515 (or 27504 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 56.

The spelling of 668032608287 in words is "six hundred sixty-eight billion, thirty-two million, six hundred eight thousand, two hundred eighty-seven".