668053312887 has 4 divisors (see below), whose sum is σ = 890737750520. Its totient is φ = 445368875256.

The previous prime is 668053312873. The next prime is 668053312903. The reversal of 668053312887 is 788213350866.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 668053312887 - 2⁸ = 668053312631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668053312187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111342218812 + ... + 111342218817.

It is an arithmetic number, because the mean of its divisors is an integer number (222684437630).

Almost surely, 2^668053312887 is an apocalyptic number.

668053312887 is a deficient number, since it is larger than the sum of its proper divisors (222684437633).

668053312887 is a wasteful number, since it uses less digits than its factorization.

668053312887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222684437632.

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 668053312887 in words is "six hundred sixty-eight billion, fifty-three million, three hundred twelve thousand, eight hundred eighty-seven".