680777811 has 32 divisors (see below), whose sum is σ = 1153958400. Its totient is φ = 388571040.

The previous prime is 680777807. The next prime is 680777827. The reversal of 680777811 is 118777086.

It is a happy number.

It is not a de Polignac number, because 680777811 - 2² = 680777807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680777831) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 236521 + ... + 239381.

It is an arithmetic number, because the mean of its divisors is an integer number (36061200).

Almost surely, 2^680777811 is an apocalyptic number.

680777811 is a deficient number, since it is larger than the sum of its proper divisors (473180589).

680777811 is a wasteful number, since it uses less digits than its factorization.

680777811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4136 (or 4130 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 45.

The square root of 680777811 is about 26091.7192036094. The cubic root of 680777811 is about 879.7010912328.

The spelling of 680777811 in words is "six hundred eighty million, seven hundred seventy-seven thousand, eight hundred eleven".