680206668 has 24 divisors (see below), whose sum is σ = 1630045872. Its totient is φ = 220607424.

The previous prime is 680206633. The next prime is 680206721. The reversal of 680206668 is 866602086.

It is a super-2 number, since 2×680206668² = 925362222383324448, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 765555 + ... + 766442.

It is an arithmetic number, because the mean of its divisors is an integer number (67918578).

Almost surely, 2^680206668 is an apocalyptic number.

It is an amenable number.

680206668 is an abundant number, since it is smaller than the sum of its proper divisors (949839204).

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

680206668 is a wasteful number, since it uses less digits than its factorization.

680206668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532041 (or 1532039 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 680206668 is about 26080.7719977764. The cubic root of 680206668 is about 879.4550120741.

The spelling of 680206668 in words is "six hundred eighty million, two hundred six thousand, six hundred sixty-eight".