680716671 has 24 divisors (see below), whose sum is σ = 953062320. Its totient is φ = 432132096.

The previous prime is 680716661. The next prime is 680716679. The reversal of 680716671 is 176617086.

It is not a de Polignac number, because 680716671 - 2²⁷ = 546498943 is a prime.

It is a super-3 number, since 3×680716671³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680716679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 407025 + ... + 408693.

It is an arithmetic number, because the mean of its divisors is an integer number (39710930).

Almost surely, 2^680716671 is an apocalyptic number.

680716671 is a deficient number, since it is larger than the sum of its proper divisors (272345649).

680716671 is a wasteful number, since it uses less digits than its factorization.

680716671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1975 (or 1952 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 680716671 is about 26090.5475412073. The cubic root of 680716671 is about 879.6747554083.

The spelling of 680716671 in words is "six hundred eighty million, seven hundred sixteen thousand, six hundred seventy-one".