680805701 has 4 divisors (see below), whose sum is σ = 716637600. Its totient is φ = 644973804.

The previous prime is 680805691. The next prime is 680805703. The reversal of 680805701 is 107508086.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680805701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680805703) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 17915921 + ... + 17915958.

It is an arithmetic number, because the mean of its divisors is an integer number (179159400).

Almost surely, 2^680805701 is an apocalyptic number.

It is an amenable number.

680805701 is a deficient number, since it is larger than the sum of its proper divisors (35831899).

680805701 is a wasteful number, since it uses less digits than its factorization.

680805701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35831898.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 680805701 is about 26092.2536588927. The cubic root of 680805701 is about 879.7131042215.

The spelling of 680805701 in words is "six hundred eighty million, eight hundred five thousand, seven hundred one".