680306811 has 64 divisors (see below), whose sum is σ = 1022754816. Its totient is φ = 400752000.

The previous prime is 680306789. The next prime is 680306843. The reversal of 680306811 is 118603086.

It is not a de Polignac number, because 680306811 - 2⁵ = 680306779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680306611) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6735661 + ... + 6735761.

It is an arithmetic number, because the mean of its divisors is an integer number (15980544).

Almost surely, 2^680306811 is an apocalyptic number.

680306811 is a deficient number, since it is larger than the sum of its proper divisors (342448005).

680306811 is a wasteful number, since it uses less digits than its factorization.

680306811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 680306811 is about 26082.6917897674. The cubic root of 680306811 is about 879.4981690271.

Adding to 680306811 its reverse (118603086), we get a palindrome (798909897).

The spelling of 680306811 in words is "six hundred eighty million, three hundred six thousand, eight hundred eleven".