662778603205026 has 128 divisors (see below), whose sum is σ = 1668397188317184. Its totient is φ = 170509795744320.

The previous prime is 662778603205013. The next prime is 662778603205067. The reversal of 662778603205026 is 620502306877266.

662778603205026 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 266049825 + ... + 268529451.

It is an arithmetic number, because the mean of its divisors is an integer number (13034353033728).

Almost surely, 2^{662778603205026} is an apocalyptic number.

662778603205026 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 662778603205026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (834198594158592).

662778603205026 is an abundant number, since it is smaller than the sum of its proper divisors (1005618585112158).

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

662778603205026 is a wasteful number, since it uses less digits than its factorization.

662778603205026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2485164.

The product of its (nonzero) digits is 60963840, while the sum is 60.

The spelling of 662778603205026 in words is "six hundred sixty-two trillion, seven hundred seventy-eight billion, six hundred three million, two hundred five thousand, twenty-six".