680655425 has 6 divisors (see below), whose sum is σ = 844012758. Its totient is φ = 544524320.

The previous prime is 680655419. The next prime is 680655497. The reversal of 680655425 is 524556086.

It can be written as a sum of positive squares in 3 ways, for example, as 2521744 + 678133681 = 1588^2 + 26041^2 .

It is not a de Polignac number, because 680655425 - 2¹⁴ = 680639041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13613084 + ... + 13613133.

It is an arithmetic number, because the mean of its divisors is an integer number (140668793).

Almost surely, 2^680655425 is an apocalyptic number.

It is an amenable number.

680655425 is a deficient number, since it is larger than the sum of its proper divisors (163357333).

680655425 is a wasteful number, since it uses less digits than its factorization.

680655425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27226227 (or 27226222 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 41.

The square root of 680655425 is about 26089.3737947081. The cubic root of 680655425 is about 879.6483723436.

The spelling of 680655425 in words is "six hundred eighty million, six hundred fifty-five thousand, four hundred twenty-five".