680805005 has 8 divisors (see below), whose sum is σ = 817106400. Its totient is φ = 544550416.

The previous prime is 680804983. The next prime is 680805029. The reversal of 680805005 is 500508086.

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 680805005 - 2⁸ = 680804749 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48026 + ... + 60564.

It is an arithmetic number, because the mean of its divisors is an integer number (102138300).

Almost surely, 2^680805005 is an apocalyptic number.

It is an amenable number.

680805005 is a deficient number, since it is larger than the sum of its proper divisors (136301395).

680805005 is a wasteful number, since it uses less digits than its factorization.

680805005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23403.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 680805005 is about 26092.2403215975. The cubic root of 680805005 is about 879.7128044392.

It can be divided in two parts, 68080500 and 5, that multiplied together give a square (340402500 = 18450²).

The spelling of 680805005 in words is "six hundred eighty million, eight hundred five thousand, five".