680561371077 has 16 divisors (see below), whose sum is σ = 1058210102400. Its totient is φ = 388892211456.

The previous prime is 680561371069. The next prime is 680561371079. The reversal of 680561371077 is 770173165086.

It is a happy number.

It is not a de Polignac number, because 680561371077 - 2³ = 680561371069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680561371079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 330689628 + ... + 330691685.

It is an arithmetic number, because the mean of its divisors is an integer number (66138131400).

Almost surely, 2^680561371077 is an apocalyptic number.

It is an amenable number.

680561371077 is a deficient number, since it is larger than the sum of its proper divisors (377648731323).

680561371077 is an equidigital number, since it uses as much as digits as its factorization.

680561371077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661381337 (or 661381323 counting only the distinct ones).

The product of its (nonzero) digits is 1481760, while the sum is 51.

The spelling of 680561371077 in words is "six hundred eighty billion, five hundred sixty-one million, three hundred seventy-one thousand, seventy-seven".