668141406747 has 12 divisors (see below), whose sum is σ = 1021863328200. Its totient is φ = 419225980608.

The previous prime is 668141406739. The next prime is 668141406767. The reversal of 668141406747 is 747604141866.

It is a happy number.

It is not a de Polignac number, because 668141406747 - 2³ = 668141406739 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 668141406693 and 668141406702.

It is not an unprimeable number, because it can be changed into a prime (668141406727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2183468497 + ... + 2183468802.

It is an arithmetic number, because the mean of its divisors is an integer number (85155277350).

Almost surely, 2^668141406747 is an apocalyptic number.

668141406747 is a deficient number, since it is larger than the sum of its proper divisors (353721921453).

668141406747 is a wasteful number, since it uses less digits than its factorization.

668141406747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4366937322 (or 4366937319 counting only the distinct ones).

The product of its (nonzero) digits is 5419008, while the sum is 54.

The spelling of 668141406747 in words is "six hundred sixty-eight billion, one hundred forty-one million, four hundred six thousand, seven hundred forty-seven".