680267021 has 12 divisors (see below), whose sum is σ = 812724192. Its totient is φ = 557731416.

The previous prime is 680266987. The next prime is 680267023. The reversal of 680267021 is 120762086.

It is not a de Polignac number, because 680267021 - 2¹⁰ = 680265997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (680267023) 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 11 ways as a sum of consecutive naturals, for example, 88151 + ... + 95556.

It is an arithmetic number, because the mean of its divisors is an integer number (67727016).

Almost surely, 2^680267021 is an apocalyptic number.

It is an amenable number.

680267021 is a deficient number, since it is larger than the sum of its proper divisors (132457171).

680267021 is a wasteful number, since it uses less digits than its factorization.

680267021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183760 (or 183737 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 680267021 is about 26081.9290122491. The cubic root of 680267021 is about 879.4810219037.

The spelling of 680267021 in words is "six hundred eighty million, two hundred sixty-seven thousand, twenty-one".