680548651 has 2 divisors, whose sum is σ = 680548652. Its totient is φ = 680548650.

The previous prime is 680548643. The next prime is 680548663. The reversal of 680548651 is 156845086.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 680548651 - 2³ = 680548643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 680548598 and 680548607.

It is not a weakly prime, because it can be changed into another prime (680548601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340274325 + 340274326.

It is an arithmetic number, because the mean of its divisors is an integer number (340274326).

Almost surely, 2^680548651 is an apocalyptic number.

680548651 is a deficient number, since it is larger than the sum of its proper divisors (1).

680548651 is an equidigital number, since it uses as much as digits as its factorization.

680548651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 230400, while the sum is 43.

The square root of 680548651 is about 26087.3274023998. The cubic root of 680548651 is about 879.6023733042.

The spelling of 680548651 in words is "six hundred eighty million, five hundred forty-eight thousand, six hundred fifty-one".