680320851 has 12 divisors (see below), whose sum is σ = 1055191752. Its totient is φ = 388754688.

The previous prime is 680320847. The next prime is 680320877. The reversal of 680320851 is 158023086.

It is a happy number.

It is not a de Polignac number, because 680320851 - 2² = 680320847 is a prime.

It is not an unprimeable number, because it can be changed into a prime (680320801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2313870 + ... + 2314163.

It is an arithmetic number, because the mean of its divisors is an integer number (87932646).

Almost surely, 2^680320851 is an apocalyptic number.

680320851 is a deficient number, since it is larger than the sum of its proper divisors (374870901).

680320851 is a wasteful number, since it uses less digits than its factorization.

680320851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628050 (or 4628043 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 680320851 is about 26082.9609323788. The cubic root of 680320851 is about 879.5042192724.

The spelling of 680320851 in words is "six hundred eighty million, three hundred twenty thousand, eight hundred fifty-one".