668051227518 has 32 divisors (see below), whose sum is σ = 1407161600640. Its totient is φ = 210852851040.

The previous prime is 668051227513. The next prime is 668051227531. The reversal of 668051227518 is 815722150866.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668051227513) 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, 1319073 + ... + 1753868.

It is an arithmetic number, because the mean of its divisors is an integer number (43973800020).

Almost surely, 2^668051227518 is an apocalyptic number.

668051227518 is an abundant number, since it is smaller than the sum of its proper divisors (739110373122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668051227518 is a wasteful number, since it uses less digits than its factorization.

668051227518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3074872.

The product of its (nonzero) digits is 1612800, while the sum is 51.

The spelling of 668051227518 in words is "six hundred sixty-eight billion, fifty-one million, two hundred twenty-seven thousand, five hundred eighteen".