668366741951 has 16 divisors (see below), whose sum is σ = 715052499840. Its totient is φ = 622501232640.

The previous prime is 668366741947. The next prime is 668366742007. The reversal of 668366741951 is 159147663866.

It is a cyclic number.

It is not a de Polignac number, because 668366741951 - 2² = 668366741947 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 (668366741921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24442655 + ... + 24469983.

It is an arithmetic number, because the mean of its divisors is an integer number (44690781240).

Almost surely, 2^668366741951 is an apocalyptic number.

668366741951 is a deficient number, since it is larger than the sum of its proper divisors (46685757889).

668366741951 is a wasteful number, since it uses less digits than its factorization.

668366741951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42274.

The product of its digits is 39191040, while the sum is 62.

The spelling of 668366741951 in words is "six hundred sixty-eight billion, three hundred sixty-six million, seven hundred forty-one thousand, nine hundred fifty-one".