680177777205 has 16 divisors (see below), whose sum is σ = 1135601159040. Its totient is φ = 346989242688.

The previous prime is 680177777197. The next prime is 680177777267. The reversal of 680177777205 is 502777771086.

It is not a de Polignac number, because 680177777205 - 2³ = 680177777197 is a prime.

It is a super-2 number, since 2×680177777205² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 985764550 + ... + 985765239.

It is an arithmetic number, because the mean of its divisors is an integer number (70975072440).

Almost surely, 2^680177777205 is an apocalyptic number.

It is an amenable number.

680177777205 is a deficient number, since it is larger than the sum of its proper divisors (455423381835).

680177777205 is a wasteful number, since it uses less digits than its factorization.

680177777205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1971529820.

The product of its (nonzero) digits is 8067360, while the sum is 57.

The spelling of 680177777205 in words is "six hundred eighty billion, one hundred seventy-seven million, seven hundred seventy-seven thousand, two hundred five".