660223438726 has 4 divisors (see below), whose sum is σ = 990335158092. Its totient is φ = 330111719362.

The previous prime is 660223438697. The next prime is 660223438759. The reversal of 660223438726 is 627834322066.

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

It is a self number, because there is not a number n which added to its sum of digits gives 660223438726.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165055859680 + ... + 165055859683.

It is an arithmetic number, because the mean of its divisors is an integer number (247583789523).

Almost surely, 2^660223438726 is an apocalyptic number.

660223438726 is a deficient number, since it is larger than the sum of its proper divisors (330111719366).

660223438726 is a wasteful number, since it uses less digits than its factorization.

660223438726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330111719365.

The product of its (nonzero) digits is 3483648, while the sum is 49.

The spelling of 660223438726 in words is "six hundred sixty billion, two hundred twenty-three million, four hundred thirty-eight thousand, seven hundred twenty-six".