680686322399 has 4 divisors (see below), whose sum is σ = 687703707264. Its totient is φ = 673668937536.

The previous prime is 680686322389. The next prime is 680686322429. The reversal of 680686322399 is 993223686086.

680686322399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 993223686086 = 2 ⋅496611843043.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-680686322399 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 (680686322369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3508692287 + ... + 3508692480.

It is an arithmetic number, because the mean of its divisors is an integer number (171925926816).

Almost surely, 2^680686322399 is an apocalyptic number.

680686322399 is a deficient number, since it is larger than the sum of its proper divisors (7017384865).

680686322399 is an equidigital number, since it uses as much as digits as its factorization.

680686322399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7017384864.

The product of its (nonzero) digits is 40310784, while the sum is 62.

The spelling of 680686322399 in words is "six hundred eighty billion, six hundred eighty-six million, three hundred twenty-two thousand, three hundred ninety-nine".