680609851 has 8 divisors (see below), whose sum is σ = 683002400. Its totient is φ = 678222720.

The previous prime is 680609837. The next prime is 680609861. The reversal of 680609851 is 158906086.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 680609851 - 2⁷ = 680609723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 680609798 and 680609807.

It is not an unprimeable number, because it can be changed into a prime (680609801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 636145 + ... + 637213.

It is an arithmetic number, because the mean of its divisors is an integer number (85375300).

Almost surely, 2^680609851 is an apocalyptic number.

680609851 is a deficient number, since it is larger than the sum of its proper divisors (2392549).

680609851 is a wasteful number, since it uses less digits than its factorization.

680609851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2709.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 680609851 is about 26088.5003593537. The cubic root of 680609851 is about 879.6287393113.

The spelling of 680609851 in words is "six hundred eighty million, six hundred nine thousand, eight hundred fifty-one".