628820866866 has 8 divisors (see below), whose sum is σ = 1257641733744. Its totient is φ = 209606955620.

The previous prime is 628820866829. The next prime is 628820866897. The reversal of 628820866866 is 668668028826.

It is a sphenic number, since it is the product of 3 distinct primes.

628820866866 is an admirable number.

It is a super-2 number, since 2×628820866866² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 628820866797 and 628820866806.

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 in 3 ways as a sum of consecutive naturals, for example, 52401738900 + ... + 52401738911.

It is an arithmetic number, because the mean of its divisors is an integer number (157205216718).

Almost surely, 2^628820866866 is an apocalyptic number.

628820866866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

628820866866 is a wasteful number, since it uses less digits than its factorization.

628820866866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104803477816.

The product of its (nonzero) digits is 127401984, while the sum is 66.

The spelling of 628820866866 in words is "six hundred twenty-eight billion, eight hundred twenty million, eight hundred sixty-six thousand, eight hundred sixty-six".