680650305 has 8 divisors (see below), whose sum is σ = 1089040512. Its totient is φ = 363013488.

The previous prime is 680650303. The next prime is 680650309. The reversal of 680650305 is 503056086.

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

It is not a de Polignac number, because 680650305 - 2¹ = 680650303 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680650303) 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, 22688329 + ... + 22688358.

It is an arithmetic number, because the mean of its divisors is an integer number (136130064).

Almost surely, 2^680650305 is an apocalyptic number.

It is an amenable number.

680650305 is a deficient number, since it is larger than the sum of its proper divisors (408390207).

680650305 is a wasteful number, since it uses less digits than its factorization.

680650305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45376695.

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 680650305 is about 26089.2756702826. The cubic root of 680650305 is about 879.6461667190.

The spelling of 680650305 in words is "six hundred eighty million, six hundred fifty thousand, three hundred five".